I think your pain sounds worse than mine...but I get a "tight head" feeling all over and it makes me feel dizzy...my cervical spine is all messed up and I get a lot of headaches stemming from the bones just at the bottom of my skull, and the pain shoots into the eye of whichever side it's on. It's nauseating and I always have to take 800mg of Motrin when this happens (yesterday!).
Do you see a chiropractor? I'd be interested to know if you're as messed up as me in that area! It may not be the only factor, but it certainly could contribute!