honestly,i would REALLY push your docs for that MRI on your shoulder BEFORE going thru the PT thing. in some cases, and given just what could be going on in there(given your symptoms), it "could' possibly make things worse if there IS some level of actual tear within that rotator cuff area and you are told to do some level of PT that could simply make things much worse for you,ya know what i mean? i would just push very hard for that MRI of the rotator area first if i were you. you need to know what you are actually dealing with before attempting something that has the possibility of making things worse,thats all. i do wish you luck with this. please continue to keep us posted. FB