I have started getting a weird sharp deep pain in

Patient: I have started getting a weird sharp deep pain in the joints of my shoulders I believe, this started around a day ago after I finished gym. I thought it wasn’t nothing at all to be concerned about so I tested it off and continued to the next day. In the morning I could feel the sharp weird pain slightly as I out stretched my arms in a crucifix position and rotated my arms slightly. I didn’t know what was going on so later that evening I went to the gym as normal but the pain gradually started lasting longer intervals and felt deep in my shoulder. I don’t know where this has come from and I’ve never experienced any shoulder pains at all. I’m 19 years old if that helps! Please can you help as I really want to get back into gym and continue as I have been for weeks now. Thanks.

Doctor: