Pec Minor Strain from Squatting?
So about 5 months ago I've had an injury which was (after MANY different doctor visits) diagnosed as Thoracic Outlet Syndrome - specifically Pectoralis Minor Syndrome on my left side. And to sum it up this completely fucked my grip/pushing strength for about 3-4 months, also with my fingers being numb and having tightness in my front neck.
I couldn't find out whether this was from having the bar in the wrong place while squatting or a too narrow grip on the deadlift, but I've adressed both of those.
So recently I started squatting again and noticed the same symptoms on my right side (the other one). One day I had slight numbness in my fingers that went away in 1-2 hours (and shrugged it off), and the workout afterwards caused it to be persistend for ~4 days now, with the neck tightness returning and my chest having spams immediately afterwards.
Today I tried squatting and immediately felt the symptoms getting worse during the first warmup set, then stopped. I'm not feeling any pain during this.
Right now I'm not feeling any weakness, my pec minor hurts when stretching and is a bit tight, but otherwise functional. But I fear that going on will aggravate it.
Any ideas what's causing this ? (chest too high, bar too low, scapula too retracted?)
Also what would be the best way to rehab from my current point? Feels like it's not too serious yet.