Jaq and Rabbit - I know how you feel re the pelvis pain. However, I was told to avoid sleeping in the recovery position as this can make pain worse. If you sleep with a pillow between your legs, try to keep the legs parallel. It might help a bit.
Also, if you are really suffering, the consultant told me to take paracetamol regularly as it works best that way. He also gave me loads of codeine, but I only take that if I am in agony and haven't slept in days. Even though it's safe in pregnancy, makes me nervous.
Also if you have sore hips, try icing each side for twenty minutes around twenty minutes before bed. It really helped me get a few hours sleep in the early days.
Hang in there. SPD is a nightmare!