Hello~I would ask your doctor for a test to rule out Mono, some of your symptoms point to that.
Also, I would certainly try a chiropractor. You very well could have some misplaced vertebrae in your neck, if that is the case, you will not be able to turn your head without it hurting, this can also cause the "numbness"
I will say that anxiety can play a part in this, but, before chalking it up to that, I feel that some tests need to be run to rule out any serious issues.
I hope you feel better soon.
The neck pain keeps getting worse. I can only sleep on the right side and if i twist my neck or apply pressure on the vessels i get twitches.