Hi CheezelMonster
The pain you are having is caused by a hormone called relaxin. Relaxin causes all your joints and ligaments to loosen in preparation for birth. Unfortunately a very common side effect of this hormone is a pain in your pubic bone and achy hips. And now for the bad news you will probably be stuck with this pain until you give birth. You may be able to ease the pubic bone pain by moving slowly and trying to keep your knees together when you move.