If ur lucky it's muscle strain ar spasm from your rank stupidity in reading in one pos all that time. It's a bu88er, rank stupididty, but if it werent for that I wouldnt be able to sit at the computer for more than 10 mins, and I cant let you all off the hook that easily. (But dont worry, I wont infest CB as well. Hardly ever even look, but happened on your post this AM.)
Muscle pain is consistent with referred pain in the head, and even that can be quite persistent, but you have to hope it's not a trapped nerve, and if youve got nerve outlet probs it's prob because of arthritis.
Is Javier a chiro? Do NOT let him manipulate your neck. I wont go near them since I failed to fight one off when he bullied me into letting him do that when my neck had finally settled down after years of pain and I kept insisting "it'll do very nicely thank you.". I used to be reassured by the fact that they take Xrays these days, but thats just for street cred and give them time to blind you with chirobabble. For anything perisistent involving nerves you really need an MRI before you let anyone loose on your spine. And even in chirobabble guidelines it warns against manipulatiing the neck. Sqad may confirm that in orthodox medicine it is held to be too dangerous for chiro. People have been killed by it.
If he is a masseur, you may get instant relief!