[UConnJulie]

It sounds as though you have impingement, probably from a large muscle imbalance between your pressers and your pullers.

1. Forward shoulder posture, excessive internal rotation, scapular instability, impingement, rotator cuff problems ... etc etc etc ...
2. You probably need to lay off pressing for a good long while ... and implement a postural correction program along with scapular stability exercises, pectoral stretching, and lots of pulling to correct the imbalance.