So ever since my daughter has been head down (which had been since around 26 weeks and um 34 right now) I've noticed my pelvic bone has been cracking. It has never happened before pregnancy or anything. It only happens during the middle of the night when I go to turn to my other side and it randomly happens not every time (kind of reminds me of when your knees crack). Has anyone else had this happen? I keep forgetting to ask my midwife at doctor appointments.