I'm not sure how far along you are, but are you avoiding lying on your back because you have heard it is bad for your baby?

I was doing that because I had ready that you shouldn't after 18 weeks due to pressure on the vena cavea or something like that. I asked my ob and he said it wasn't a problem. He said it might be an issue in the last few weeks and if it was I would know about it because I would feel really sick and like I was about to pass out.

Anyway, I'm not sure if that is helpful or not, but good luck anyway.