I have a chronic pain disorder, and
presumably this neck
is part of it, but the docs I've been seeing, including neurologists, rheumatologists, and physiatrists, can't come up with a diagnosis, and the EMG, NCV, MRI, EEG, or other tests that have been done are all normal.
Anxiety/stress is a possible cause, as are a variety of neuromuscular disorders, joint disorders, etc. Pursue a full medical evaluation to find out what, if anything, can be diagnosed.