Have you bought a Bed Buddy or made one? These give off moist heat and that could help your neck. The Bed Buddies can be found at Walgreens and other places and you can make one by taking a tube sock, fill it 2/3's full of raw long grained rice, and tying a knot on the end. Pop it in the microwave and it gives off moist heat.
One stretch that I do is not listed in the stretching exercises. This is for the spot between your shoulder blades that no stretches seem to reach. Bend at the waist, let your arms hang down, and then start swinging them in different directions. This stretches that area. My massage therapist told me about this and it does help!
Hope you start to feel better soon.