I was playing in a tennis match on Friday and heard a loud pop when I hit a volley. Followed by fairly intense immediate pain and "cramping" of the surrounding muscles near the lower head of the shoulder and upper portion of the bicep. I kept playing and stretching between points and the searing pain went away but the pain felt like a deep bruise. The bicep is now 25% bigger than the other arm, no loss of strength and feels OK except for the deep bruise feeling. After 2 days+ there is no visible bruising. The upper portion of the bicep is noticeably more "peaked". About 6 weeks prior to this I saw an orthopedic about numbness and weakness in the same arm running from the deltoid across the bicep to the thumb. He thought I had pinched a nerve and possible light tear. My chiropractor gave me relief through a few visits. Sorry for going on so long, just trying to get anything relevant in here. Any ideas or thoughts appreciated!