My story started about 4 years ago when I crashed my car into a tree and fractured my 2nd rib on the left side.  When it happened my rib felt a little sore but did not really affect me until 1 month later when I was in class and I started getting severe chest pains.  I went to the ER and they said I fractured my 2nd rib.  We assume it was from the auto accident.  At the time they told me that nothing could be done for it and it would heal on its own.  After the fracture I remember being in a karate class and when I rotated my left shoulder it would always pop in and out with no pain.  I also remember having trouble when using the shoulder pull down bar at the gym but did not think anything of it.