oh come on - now your just teasing us by not describing it!
did PT pull your arms down & back behind you and stretch/hold them?

Did you ever have top rib mobilization or Nimmo ?{kind of mix of TRP & slow deep pressure massage}
When I was all locked up with upper body spasms, my chiro did those for me, it was amazing how such simple things could make such a difference. At that time he worked on the pec major, scalenes, SCM.
A week later he got the INF Stim and it really helped with the lingering tightness.