What Can I Do to Sleep Better in the Third Trimester

If you’re in your third trimester and you’re lying there wide awake, you’re not alone—and you don’t have to just “deal with it.” Most quick changes you can try at home come down to a simple routine: get into the best side-sleeping position, build a pillow setup that supports your body, slightly elevate your upper body if reflux or snoring is acting up, then pick one calming trick (like white noise, a meditation app, or lavender scent) and pay attention to timing.

Think of it as one bedtime routine, not advice you test for a night and then forget.

Sleep Position Basics in the Third Trimester: Side-Sleeping First

In the third trimester, side-sleeping is usually your best place to start. It’s also the most common “base rule” because it often helps you feel more comfortable while you rest.

Here’s what to aim for tonight:

• Start on your side (if you can, keep yourself there).
• Use pillows so you don’t have to keep fighting your body all night.
• If heartburn/reflux or snoring shows up, adjust your head and upper body too.

Even if you can’t stay in one position for hours (that’s normal), you’ll usually feel better when your body has a “default” setup that’s easy to return to.

Quick “try this first” positioning cues

• Turn onto your side and place a pillow between your knees.
• Add a pillow or support under your belly/tummy so your hips and lower back aren’t strained.
• If you find yourself curling forward and feeling uncomfortable, adjust until your spine feels more aligned and supported.

Left-Side Sleeping: Why It’s Commonly Recommended

You’ll hear “sleep on your left side” a lot during pregnancy sleep tips. One reason it’s so common is that many people find it helps them feel more comfortable, and it’s also linked with blood flow to the baby, uterus, and kidneys.

You don’t have to be perfect all night. But if you can get comfortable on your left side and set up your pillows so you’re not sliding or squishing yourself, that’s a big win.

If you keep rolling onto your right side, that’s okay too—just set things up so it’s easier to get back to the left.

Third Trimester Sleeping Positions: How to Set Up Your Body and Pillows

When people say “use the right pillows,” what they usually mean is: make it hard for your body to fall out of the position you want.

You’re building support at three spots: back/shoulders, knees/hips, and tummy/belly.

A simple pillow setup (no fancy gear)

If you don’t have special pregnancy pillows yet, you can still set things up well tonight:

1. Back support: Place a pillow behind your back, so you’re less likely to roll.
2. Knee support: Put a pillow between your knees.
3. Tummy support: Tuck a pillow under your tummy (or in front of your belly so it doesn’t pull you forward).

This “three-point support” can help you stay comfortable longer, even if you shift occasionally.

If you’re using pregnancy-specific pillows

A lot of “nesting” setups use the same idea:

• keep your body from twisting,
• reduce pressure on your hips and lower back,
• and help your belly feel supported.

If you already have a U-shaped pregnancy pillow or a body pillow, the next sections explain how to place them so they actually help.

U-Shaped Pregnancy Pillow and Body Pillow Setups (What to Try)

U-shaped pregnancy pillows are popular because they give you both structure and cushioning. They can help you stay angled on your side without constantly readjusting.

U-shaped pregnancy pillow setup (a practical layout)

Try this configuration:

• Lie on your side and snuggle into the U so your back is supported.
• Let the curved parts of the U help prop you up so you’re not lying flat.
• Position pillows so your belly stays supported—some people tuck a pillow under the tummy, while others support the front of the belly in a way that feels better.
• Put a pillow between your knees (or use the U’s shape if it naturally supports that space).

If your hips feel jammed or your lower back feels stretched, adjust until your body feels “lined up,” not crunched.

Body pillow “nest” setup

A body pillow can work just as well if you use it in the right place:

• Place the body pillow along your side, then hug it for shoulder and back support.
• Use your other pillow (or the body pillow) between knees.
• Add a separate pillow for tummy support if you need it.

A note about comfort

If your pillow setup causes shoulder pain or leaves your neck bent, don’t “push through.” The goal is a position that feels easy to stay in.

Elevate Your Upper Body for Reflux: Wedge Pillow or Bed Elevation

If you’re dealing with acid reflux (heartburn) or you feel worse when you lie flat, elevation can help.

A wedge pillow or raising the head of the bed by 4–6 inches is often suggested to help keep stomach acid where it belongs. Even a small lift can change how your symptoms feel at night.

What to do tonight

Pick one option:

• Use a wedge pillow: Place it under your upper body so you’re not just sitting up, but gently tilted.
• Elevate your bed head: Raise the head of the bed by 4–6 inches using safe supports, like bed risers or stable blocks made for that purpose.

Pillow placement tip

If you’re using regular pillows only, be careful: stacking pillows can sometimes bend your torso in a way that makes reflux feel worse. A wedge usually creates a steadier tilt.

Can You Sleep Sitting Up While Pregnant in the Third Trimester? What the Snippets Suggest

Yes, people ask about this for a reason. When reflux hits, sitting up can feel like relief.

From a practical standpoint, focus on the difference between:

• slumping upright (like sinking into pillows), and
• being gently elevated (like using a wedge or raising the head of the bed).

If you’re asking, “Can I sleep sitting up while pregnant third trimester?” the safer home option is usually not to twist into a forced sit-up. Instead, aim for gentle elevation with your torso supported. That often means a wedge pillow or raising the head of the bed.

If the wedge still doesn’t feel right, adjust the angle a little. You’re looking for a “comfortable tilt,” not a full upright position all night.

Snoring and Reflux Support: Raising the Head of Your Bed

Snoring can show up during pregnancy, and reflux can overlap with it. That’s why the “raise the head” step matters in a lot of these sleep tips.

Raising the head of your bed slightly can help:

• ease snoring
• reduce acid reflux

And the key detail to remember is the lift: 4–6 inches.

Quick setup you can do this evening

• If you have a wedge pillow, place it under your upper body.
• If not, raise the head of the bed by 4–6 inches.
• Then use side-sleeping and knee/tummy support on top of that (don’t skip those).

Most better nights come from combining steps, not picking only one.

Fall Asleep Faster: White Noise, Meditation Apps, and Lavender Scent

Once your body is supported, the next issue is often your brain. Scrolling, worrying, or just staying too alert can keep you up.

Three calming options that come up a lot are:

• a white noise machine
• a meditation app
• lavender scent (a calming scent in your room)

These don’t “fix” pregnancy. They’re meant to make it easier to quiet everything down enough to drift off.

Try a simple order

If you want something you can follow without overthinking, try this:

1. After your pillow setup, turn on white noise (or pick a calming audio sound).
2. If you’re still restless, open a meditation app and choose something meant to help sleep.
3. Add lavender scent if you already tolerate it well. Keep it gentle and don’t overpower the room.

If one of these starts to annoy you, drop it. The right sleep tool is the one that helps you relax, not the one you feel stuck using.

Naps and Timing: Rest When You Can (Including Afternoon Rest)

Third trimester sleep often gets broken up. Instead of waiting for one perfect long stretch at night, try building in rest during the day.

That might look like:

• a short nap when you can, or
• an afternoon rest when nights are rough.

You don’t have to nap for hours. The goal is to reduce the “catch-up stress” your body feels when it never really recovers.

A practical timing tip

If you can, choose nap times that won’t wreck your ability to fall asleep at night. Many people do better with earlier-day naps than late ones. If your afternoons are rough, try an earlier afternoon rest first.

Quick Troubleshooting Checklist for Pregnant and Can’t Sleep in the 3rd Trimester

If you try the setup plan and you’re still waking up a lot, use this quick check to see what might be missing.

Start here: position and pillow support

• [ ] Are you on your side (preferably left), even if you shift sometimes?
• [ ] Do you have support behind your back so you don’t roll flat?
• [ ] Is there a pillow between your knees?
• [ ] Is your tummy/belly supported so you’re not straining your hips or lower back?

Then check reflux/snoring triggers

• [ ] Does lying flat make heartburn worse?
• [ ] Did you elevate your upper body (wedge pillow or 4–6 inches head-of-bed lift)?
• [ ] Does snoring get worse when you’re more flat?

Finally, check your “fall asleep” tools

• [ ] Are you using white noise (or another calming sound) consistently at bedtime?
• [ ] If your mind won’t quiet, are you using a meditation app for sleep?
• [ ] Does lavender scent feel calming, or does it irritate you?

If you’re still stuck

• Try a nap earlier in the day instead of staying up late hoping night sleep will suddenly fix itself.
• If you decide to try occasional over-the-counter help, remedies that contain diphenhydramine are described as fairly safe for occasional use. (If you’re unsure, it’s still smart to check with your healthcare provider for what’s right for you.)

Tonight-to-this-week goal: one plan, not random changes

Pick one setup and run it tonight. Here’s a simple one based on a routine that goes position → pillows → reflux elevation → calming tool → timing:

1. Position: Lie on your left side as comfortably as you can.
2. Pillows: Hug a body pillow or nest with a U-shaped pregnancy pillow, and keep a pillow between your knees plus support under or in front of your tummy.
3. Reflux elevation: If reflux or snoring is part of the problem, use a wedge pillow (or raise the head of your bed by 4–6 inches).
4. Calming tool: Turn on white noise (or use a meditation app). Add lavender scent only if it feels soothing to you.
5. Timing/naps: If nights are rough, plan a small afternoon rest earlier in the day so you’re not dragging yourself through the evening.

Then, if you’re still waking up a lot, come back to the checklist and adjust one thing at a time, usually the pillow support or the reflux elevation, until your nights start to feel more steady.