At my last appointment a week ago (20 weeks) the dr. said I need to stop sleeping on my back. I read it's because it can put pressure on your vein that returns blood to your heart and it can effect the flow of blood and nutrients to your baby. Well I was always a side sleeper, now that I'm not supposed to lay on my back it seems my body doesn't want to sleep on the side anymore. Ugh, my back is hurting me and it seems like my back doesn't hurt as bad laying on it instead of my side, so I keep ending up turning onto my back. I wake up during the night and I'm on my back again. I have a body pillow and I've been putting a pillow behind my back but it doesn't seem to stop me. How concerned should I be about this? I've never felt dizzy or anything after laying on my back. Any tips for keeping myself sleeping on my side?