Heavy achy arms, upper back/neck pain, some ulnar/hand sx - another possibility could be Thoracic outlet syndrome (TOS) depending on your MRI/xrays & symptoms.
C spine pain/issues/causes/ would need to be ruled in or out before the possibility of TOS is looked at by drs. TOS is not well known or not well known to many drs, TOS rarely "shows" on any imaging and no real test to prove it.

In the past we have had quite a few nurses with TOS due to stretch injuries from lifting/moving/catching patients.

We do have a TOS forum if you'd like to read about it more.
http://neurotalk.psychcentral.com/forum24.html