With your job and having some issues previously - I'd like to suggest you visit our TOS forum - Thoracic outlet syndrome..

So much of what you mention might be related ..I think our TOS forum will be much more helpful for therapies and helpful options..
I had many of those same issues SCM and more...my past posts are on the TOS forum ..

main page- TOS forum -
http://neurotalk.psychcentral.com/forum24.html

sticky threads-
http://neurotalk.psychcentral.com/thread84.html
http://neurotalk.psychcentral.com/thread125577.html