Tonight I was backing up out of a parking spot and I heard a pop noise from what sounded to be the rear of my car. Ever since I heard the pop noise my steering wheel is off center to the right about six inches and it is hard for me to keep control of my car. It feels like my whole car is swaying back and forth. Everytime I go over a bump with my back tires I hear the same pop again. Can anyone diagnose the problem? Thanks.