I would suggest posting in the Thoracic Outlet Syndrome forum.
Here is a link-
http://forums.braintalk2.org/forumdisplay.php?f=24
The reason i suggest that forum is because the people there have a lot of knowledge about shoulder/arm/neck pain. At first glance, your symtpoms could be suggestive of Thoracic Outlet Syndrome (TOS), but even if you do not have TOS the members of that forum would probably be able to suggest other diagnoses to look into because of their vast knowledge about the body areas involved.
I hope that helps, and I hope you are able to find answers and relief from your symptoms.
take care,
Liz
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