If the various therapists did not do very individualized care and mainly did a general therapy plan, that could be why you still have some issues.
Unfortunately even with lots of credentials, some coast along and do not really try to figure out or help clients..
If you can find providers that go the the extra mile and look at the big picture.. those are the really good ones..

I would stop the light weights and band exercises until you find out if it is TOS or not.
Those can worsen things if it is TOS.
The repetition as well as over taxing the upper back & arm muscles..not good for TOS.