Recently been getting pain radiating from my shoulder down my ribcage and a grinding feeling and some times and audible noise. Rarely tho it feels like it is trying to come out of socket. only injury i have had to the shoulder is bursitus and a snapped collar bone that broke an inch and a half from the shoulder socket had xrays they should nothing noticeable but when im lifting not even able to hit my max anymore before the shoulder will give out and be in pain for the next few hours been through physical therapy on it before and tried doing the exercises and it seems to not improve the situation any ideas?