I think quite a few of us "were" high achievers - the type A personality..
Seems it bites some of us in the behind...

It takes awhile to figure out that we need to scale back as best we can and be more type B or C.
And accepting the change takes time too, like the stages of grief, we usually have to go thru those in regards to the situation.

What does the PT think about the shoulder issue?
Personally I trust what a expert/advanced PT says about this stuff more than what a dr says, unless something specific shows on testing as to a cause of TOS. IMO.

* PT spends more time with you.
PT studies more on the body /structure/ interactions.

Hopefully your PT has taken extra classes and is working to find what is the best things for you.
It takes time, but if no benefits are seen, then maybe try another PT or DC or body worker of some sort...

The Alpha stim might help , does PT place have one you can try a few times - or do you have to buy one - some ins companies will pay for these things if dr rx's them.

I have a EMS stim & just got a IF stim recently, I use mine for tight achy muscles.

Also read thru the other threads for what things help and what others have tried and found.