What I know about PT, and I've had way too much, is that you have to ice, rest, elevate for some period of time for healing to occur. If you didn't do that, and God knows most of us don't when we're young, it probably never had time to heal. But my experience is, PT doesn't really fix anything, mostly the therapist just tells you not to do whatever it was that hurt you and when you start again it often just comes back again because it never fully heals for some of us when we're unlucky. Lifting weights with a bad shoulder would seem to be just the thing not to do if rest was required, but you know better what you were told you could and shouldn't do. Also, the same condition in one person can be really mild and in another crippling. We're just built differently, and anyone who is athletic in any regular way tolerates more pain than those who aren't because things like weight lifting cause some pain anyway. Meaning, no way to really tell. If it lasts or worsens, you have two options: stop doing whatever hurts it for as long as it takes or return to the ortho for that MRI. Probably, though, you'd be sent back for more PT, as the pain and restriction of movement doesn't seem that bad. Peace.