I am not aware of your H&P or S/SX ---- for example I was not aware that your sx only occurred when it gets cold. That is why I say it is "possible". Advice on this forum is not meant to replace the advice of your doctor (who hopefully is a TOS expert). However, people who have TOS and lived with it for years have learned some things that doctors might not be aware of or dont believe in (for example, MD's don't typically believe in chiros or accupuncture).
When I say "upstream", I mean a cause that is further up in the order of things.
Gotta go --- I'll try to post with a better explanation later.