You might want to visit our Thoracic Outlet Syndrome forum - TOS for short-
Thoracic Outlet Syndrome/Brachial Plexopathy.
Quite a bit of your sx fit , except the feet numbness.

It is often caused by repetitive work, and can overlap sx of cubital & carpal tunnel (TOS + RSIs can = double or triple crush injury)
TOS sx can originate from nerve or vascular impingement/compressions in the collarbone, scalenes, SCM, pec minor areas.

Main page -
http://neurotalk.psychcentral.com/forum24.html
useful info sticky thread-
http://neurotalk.psychcentral.com/thread84.html