It would be nice if PT WOULD help my shoulder, but it never has - and I've been in PT with multiple therapists for months on this very shoulder. The mobility work I do HAS helped in some areas. We KNOW there is a physical problem with my shoulder, it is time to figure it out. Part of it is indeed muscular and connective fiber related - but it is time to know if there is anything else going on. Thankfully the MRI isn't THAT expensive, I only have to pay 20% of it...and it is a good diagnostic tool. I DO know that I've never experienced anything like the pain I had last night. Ever, and that included when I broke my upper arm and collar bone. That is why it has my attention.