Hi smile-ss,
I was having a lot of trouble sleeping a few months ago already as I'm a tummy sleeper and i would get so uncomfortable trying to stay on my side, my hip would hurt too...I'd usually end up on my tummy. What I did is I bought a body pillow when I was in Canada and I sleep beside that with one leg on top and arm on top and it had made it more comfortable to sleep. My hip still gets a bit sore but it doesn't seem to be as bad and I can actually fall asleep a lot easier. I don't know if that would help you at all. My back is starting to hurt a lot, not just my low back, my shoulders, neck, middle and low back. Pregnancy sure changes the body a lot!!!