I don't know anything about Amitriptyline, but for neck pain such as you mentioned, I would try seeing a D.O. (Doctor of Osteopathy, I think) or a PT who is a CFMT (Certified Functional Manual Therapists). Either can work on such neck pain.

Good luck, and if you try the amitriptyline, please report back with the results!

Jenn
Santa Clara CA