27 weeks today and rib pain

I've done pretty good with keeping my body aches to the minimum. but this rib pain at night is killing me! I a always wake up on my back (which for the time being I don't have an issue with since I'm not that big yet) but I'm usually a side or belly sleeper. when I try to sleep on my sides or belly (with a pillow with a hole in it for my belly) I feel like I can't breath and my ribs are going to break. I don't know how the heck I am going to go 13 more weeks!