Do you have reffered pain from that area? Like pain that travels down the arm. Usually a tear will cause referred pain too, un;ess it is a small tear. An MRI will show the soft tissue so that is def one yoi should get and with and without contrast. I had a torn labrum in my hip that even an MRI didnt show how bad it really was , so MRIs are a good scan to get, but arent always accurate either. If it keeps bothering you, another good way to know if its coming from the joint is to have a cortisone injection right in the joint. If the pain is relieved, than it is quite likely that your problem could be a tear. Good luck to you and stop lifting heavy for awhile,lol