Relvay makes a pregnancy pillow. We also tell you below when you should not buy one.
The short answer
The pillow probably did not change. The surface under it did. A softer or thicker topper lets your hips and shoulder sink differently, so the same pillow now meets your body at a new height. Compare before and after, then change one thing per night.
- Write down what changed underneath you.
- Adjust the setup first, then the layers.
- New or sharp pain goes to your midwife.
What should you check first after a mattress or topper change?
Start by writing down what changed and where it feels different. Then look at where the pillow actually touches you now. Five steps, before you move or buy anything.
- Name the change. New mattress, new topper, thicker or thinner, softer or firmer, a new protector or pad.
- Name the spot. Bump, lower back, hips, knees, neck. Where does it feel different from last week?
- Lie down in your usual setup and ask someone to take a photo from the foot of the bed. Compare it with how the setup looked before, if you have a picture.
- Look at the contact points. Is the bump support touching your bump, or is there a gap? Is the back support at your lower back or has it ended up higher?
- Change one thing per night, starting with pillow position. Leave the new mattress or topper alone for now.
| Before | After | Note | |
|---|---|---|---|
| Surface | Mattress only | Mattress plus topper | Thickness and feel |
| How far your hip sinks | A little | Noticeably more | Look at the photo |
| Bump support contact | Touching | Gap under the bump | Height changed |
| Back support contact | Lower back | Sits higher | Body sank, pillow did not |
| Knee pillow | Level legs | Top knee higher | May now be too thick |
| What feels off | Nothing | Hip, neck | One spot to fix first |
Copy the table and fill in your own words. The example column is only there to show the kind of note that helps.
Why does a new topper change how the pillow feels?
Because you and the pillow sink by different amounts. On a softer surface your hips and shoulder go deeper, while a pillow resting beside you mostly stays on top. The gap between them changes, and so does where the support lands.
Sunday, 7:05 a.m.
I was 30 weeks when we bought a three-inch foam topper, because the mattress felt hard on my hips. The first night felt like sinking into a cloud. The second morning my lower back ached for the first time in weeks.
Nothing about my pillow setup had changed, so I decided the pillow had gone flat. I had a new one in my basket before breakfast. Jonah asked if anything else was new. I pointed at the topper and then stopped.
- If the setup that worked last week suddenly sits too high or too low...
- If you are blaming the pillow for something that started the night the bed changed...
- If you have already started adding blankets and extra pillows to fill the gaps...
Lillian's pillow had not gone flat. Her body had moved down, and the pillow had stayed where it was.
A firmer new mattress can do the opposite. You sink less, so a knee pillow that was right before may now lift your top knee too high.
Your pillow and your mattress work as one setup. Change either one and the whole setup needs checking again.
Should you change the pillow, the topper or the setup?
Change the setup first because it costs nothing. Then decide about the topper or mattress. Replace the pillow last, and never change two things on the same night.
- Night 1: move the bump support closer, or lower, to close the gap your photo showed.
- Night 2: move the back support down to your lower back again.
- Night 3: check the knee pillow height. Swap for a thinner or thicker one if your top knee is not level.
- Then judge the surface. If the new layer still feels wrong with a corrected setup, check its return terms and any note from the maker about settling in.
- Only then the pillow. If a corrected setup on the new surface still misses the same spot, the pillow may no longer suit your bed.
The NHS advice for back pain in pregnancy includes using a mattress that supports you properly. What feels supportive is personal, and a topper chosen for comfort is not a pain treatment. Judge the whole setup by how you feel in the morning.
Get advice if the ache is new, sharp or spreading, or does not settle once your setup is back where it was. Your midwife or GP can refer you to a physiotherapist.
Frequently asked questions
Why does my pregnancy pillow feel different on a new mattress?
Because you sink differently. On a softer surface your hips and shoulder go deeper while the pillow stays higher, so the support lands in a new place. On a firmer one the opposite happens.
Should I replace my pregnancy pillow after getting a topper?
Not straight away. First move the pillow to close any gaps, one change per night. If the same spot still feels wrong after that, then judge the topper, and the pillow last.
Can a mattress topper help pregnancy back pain?
A topper is a comfort choice, not a treatment. The NHS suggests a mattress that supports you properly. If back pain is new or getting worse, talk to your midwife or GP.
How long should I wait before judging a new topper?
Check the maker's notes on settling in and the return window. Meanwhile adjust your pillow setup so you are judging the topper, not a setup built for your old bed.
Do I need to adjust my knee pillow on a firmer mattress?
Possibly. If you sink less, the same knee pillow can lift your top knee higher than your hip. Try a slightly thinner one for a night and compare.
If you use small wedges on a new surface
The Relvay 3-Piece is two small wedges for bump and back joined by a flat strap. On a soft topper they rest on the same surface you sink into, so run the same before and after check with them: close any gap under the bump, keep the back wedge at your lower back, and reset the distance on the strap if your body now sits lower. We have not tested it on every mattress or topper.
Two wedges for bump and back, joined by a flat strap, about as wide as your torso. Keep a regular pillow between your knees. $79.99, 90-day returns.
If the pillow still feels wrong once the surface is settled, our guide to a pregnancy pillow that feels worse than regular pillows walks through a fair five-night test.
Lillian's story is a composite based on real reviews and public posts from pregnant side sleepers. Names and details are changed.
