I had a similar problem and I ignored it for a long time, but this year it just kept getting worse. I finally went to the dr and I have a torn rotator cuff, bursitis and impingement. Now I can't do anything. I do TKD and I'm a boxing trainer. I can't spar, I can't do grabs that may jerk my shoulder, I can't even hold the mits for my fighters till I get this all taken care of. So I'd say get it checked out asap.