Good point, Anne.
If possible give it many months for a true try at recovery & even more if you are continuing with any aggravating activities.
Just the PT sessions are not enough you have to do the home care and be aware of uses and postures and how your body is responding.
I took me approx 2.5 yrs to get back to a mild level of this TOS thing.
Part of the time was wasted due to the work comp system & drs not even mentioning TOS or anything like it. I had multiple RSIs by this time, neck & shoulder "strains"..