My DS1's big head dislocated mine in childbirth. It went unnoticed because it wasnt causing any pain afterwards and then one day a few weeks later I had this huge sneeze and it popped back in. I apparently damaged the soft tissue around it when it popped back in and it has never been the same since. I can't even sit in the car for too long on our drives to QLD without having to shift for comfort. Its a constant pain.

I would recommend getting it checked just to make sure that it is just healing and you cant damage it any further.