@simmiebaby same here. My doc said not to freak out over sleeping on your back. Your body will let you know.

I find myself waking up on my back sometimes but they say it compresses the uterus and decreases blood flow. Guess my body feels comfortable that way though! I try to lay on my left side as much as possible.

Sometimes thats the only way I can sleep

I didn't sleep on my back at all after 2nd trimester. Your not supposed to. Really isn't good for ya

I can't get comfy on my back without a small pillow propping up one side of my back and I mainly sleep on my sides with my top leg bent and that same small pillow under my belly/groin/thigh area.
Idk what I'm gonna do when I can't sleep like that anymore....