Have you tried a hot shower on your neck? Or an epsom salts bath? Sometimes when my neck aches, I end up holding my head stiffly so everything just piles on. Gentle massage can also help, if you can stand it. These are exercises that I do when I have muscle pain: Roll your shoulders backwards and down.
Squeeze your shoulder blades together. Push your head backwards into your hands and hold for 30 seconds. You can also lay down on the floor (if you can get back up!) and push your head down into the floor. Bring your ear to your shoulder-both sides. I usually do each exercise 10 times, except for the head pushing, which is just five times. I have a bunch of exercises for my neck and back that I got from a terrific physical therapist 6-7 years ago. While they don't take away a bunch of pain in the moment, they do help keep me from stiffening up. They also help keep my neck aligned so I don't get as much joint pain.