This is my 7th pregnancy, 6th baby and 3rd pregnancy in 3 years. My back and hips have been killing me too! And feeling like they are burning. Towards the end of my last pregnancy my pelvis started splitting? ( can’t remember what that’s called) and it’s already started with this pregnancy! I was really hoping I wouldn’t have that this time and I hope it doesn’t get worse. I will have to start going to the chiropractor again, but it only helps for a short period of time.