I have been worried about my shoulder also...
I went to the doctor and he said there was nothing wrong with the shoulder, but I lost most the strength in the shoulder and sometimes it aches so bad I could just die. Then I get these pains and numbing down the arm to the elbow.. but the stupid doctor told me there was nothing wrong with it. Just like my knee that was fine according to him. It went out and threw my back out. I think its time to throw the doctor out...
I happen to like my tag line...

Hope you get all straightened out.