I've had the same thing. got really bad for a couple years. went to over 10 docs of all specialties, had x rays mri's and countless physicals. it was'nt until i sought help for emotional problems and was diagnosed bipolar that i started to make connection between the two. depakote ended all physical symptoms over night, unfortunately also sent me completely manic.
i think the anxiety and stress from bipolar cause the muscle tension which in turn pulled my spine and pinched the nerves. i have an x ray where you can see my cervical spine pulled straight. i'm on lamictal and has all but stopped the tension and numbness problem
then again that's me talk to pdoc about anti convulsants if your not on one already.
by the way welcome to the forum