ON or something else?

I have been dealing with symptoms that I think are similar to ON but I am not sure if that was/is causing my symptoms. I never had migraines or even headaches in the past but in April of last year I twisted and strained my neck, I went to the er and I was unable to move my neck. It was from that moment on that I’ve had a throbbing pain in the suboccipital area of the neck that radiates upwards and backwards and behind my eye and on top of my forehead. It sometimes radiates to my shoulders too. It’s a constant throbbing pain on both sides and occasionally will be sharp/shooting pain above my ears. It hurts worse when I move my neck and it’s even behind my eyes too. It’s constant, everyday. Ice does help it a bit and advil.