Yikes, listen to yourself, Michael - there's no "sometimes" about it - your level of acceptance for TMS is miniscule to non-existent.
Look, you've been checked out, and the only advice you've received from conventional practitioners is to do PT. PT is nice if you are actually injured. At age 58 (two years "Before Sarno") I crashed my bike at high speed and cracked my femur, resulting in surgery to insert three pins. Yeah, I did the PT, because they cut through all of my thigh muscles to reach the bone, and those muscles had to learn how to work together again. But they would have done that anyway, although probably not as well or as fast as by doing the PT. But honestly, I could have put off the PT and picked it up again later without any damage.
Now, I am not a health professional, I'm only a tax accountant, but I will tell you again that I quit going to about three PTs and a chiropractor cold turkey, and I've never looked back. I honestly can't see that stopping PT in your case is going to make any difference to your pain because all that the PT is doing is reinforcing your obsession over your body parts, AND reinforcing the idea that someone else should fix you.
If you want to recover, you need to give TMS a chance, which means devoting your time and energy 100% to a new belief system. I don't think, at this point, that you have anything to lose, but you do have a lot to gain.