Sorry to hear this. I guess I missed that (assuming you had shared this before, mind you - pretty sure I shared stuff about my back betraying me).
I know a guy with what he calls TOS (thoracic outlet syndrome?) and he is about to undergo surgery to improve his prognosis for the future.
Any surgery is one scary assed thing with which to be forced to contend.
I hope your surgery was a success!
Both of my most recent ones were.