Could the some of the pain be work , sports related at all?
*desk job, computer, sports, weightlifting, musician, previous whiplash/car
accidents?
Any previous RSIs , elbow pain. carpal tunnel etc?

How is your posture , head forward/shoulders forward, hunched ?

If any of these may fit check out our TOS forum here-
http://neurotalk.psychcentral.com/forum24.html
useful sticky threads there too.

Have you had any expert PT or maybe a expert chiropractor evaluations?
Sometimes they do the hands on tests more so than MDs do.. plus they may be able to do some pain reliving modalities.. ultrasound, low level laser, IF stim...massage etc