Thank you very much for your reply.
That explains why I have much more pain after doing the exercises, no matter how gently I do them. Taking a few days off (actually, forgetting about them during Christmas and other things going on) I noticed the pain is much less. It still does hurt a LOT to lift my arm in certain directions, or to lift things with that arm, and I feel more frequent pain in the upper regions of the arm now (the primary pain site is about 4 inches below the top of my arm).
I was given a DVD of theMRI to give to my referring doctor. But first, we viewed it on our home computer --- of course can't determine anything with our untrained eyes, but I noticed numerous white spots around the joint.
If I have a partial rupture, wouldn't I have pain ALL the time?