Try to elevate your self or get a pregnancy pillow.
Ugh, it's rough. I don't know how far along you are but especially toward the end, pregnancy takes a major toll on our sleep! I read somewhere that it is all in the 'grand plan' so that we are used to being up at night with a new baby. :>) doesn't make it any better when we are suffering through it. I had sleeping stations. I started in bed. Stayed there and usually did fall asleep right away but then would wake up. Then I'd go to our couch. I'd sleep there (I don't know why, but my couch was so comfy and sleeping on my side was easier with the couch back). I had snacks at night. I took chewed my tums. I pictured the cute and wonderful baby to come to help me remember that it was ALL worth it. But, it's rough. I can't lie. The ability to move to the couch at night helped me though. good luck sweetie.