I'm tall so falling asleep on my back kills me, if you put a pillow under ur knees your back will line up even and not be sore when ya wake up! Pillow under the knees when laying on ur back or pillow between the knees while side sleeping is:I’m looking online right now actually for a prego pillow that I could use for my back and legs , I’ve always been a side sleeper especially right side but lately it’s been my left because of the pain , I smoked too much last night and fell asleep on my back smhI’m paying for it now.