Migraines and knot next to cerv spine

I have had Migraines off and on since twenties, but the last 4 months they had been constant. We got a dog around the same time and im seeing an allergist but i noticed a bump or knot on or next to my cerv spine right below the hair line.... every time i pop my neck the pain eases up or even goes away. I have to do this tho almost 3-4 times a day and some of the time it doesnt pop and i get a bad bad migraine. Pain med dont really work but helps. Does anyone have any ideas or what kind of doctor i would need to see? I have a 6th lower lumbar vert, i dont know if all of it is just being compressed or what or if it has anything to do with it. Thanks for your time.

Angie