I think I have TOS. I have been doing a rigorous yoga routine for 9 years (haven't been able to do anything for 6 months) and I am starting to think that all of the extreme poses of looking up with arms over head, holding poses, and repetitive sun salutations and chataranga poses might have been what did me in. I might be wrong but it's just a theory. I think I have multiple repetitive overuse injuries and that my whole body now went haywire.