I do suggest though, YOU have to find out whats wrong and seek a remedy.
No individual doctor, or neurologist can sort this out. The reason is that those specialists are so narrow in their field of expertise, and so ignorrant in seeking help from other professions, that failure is the only result that is possible in your case.

I want you to think back to a year before these headaches first occurred. Was you in any sort of accident, or minor head bump like bumping when raising up, or walking into something high, that could have kinked your neck. A neck injury, although no big deal at the time, can cause headaches, mood swings and even migraine headaches. These symptons may take a year to 3 years to develope.
So think back, Or you could have bad neck alignment from bad posture. Laying with head kinked to the side watching TV is a neck kinker.

I suggest to go to a Chiropractor, a reputable one that uses Xrays. I suggest to enquire among family and friends for a recommendation. I suggest one around 30 years old that has keen medical knowledge is what you want.
Take this in mind if you think your neck is traumastised.
1. use a chiro regularly for 6 months to get the bones align, budget 10 visits then a few per year.
2. use a remedial massage therapist to loosen the muscles that hold the bones in place, so that they dont pull on the bones (applys to all of your spine) Budget 3 visits
3. After 6 months and at the end of all the activity from the chiro, and massagist, see a doctor for a 3 months antiflammatory course to settle down any inflamed soft tissue, to strenghten the areas of concern.

When seeing these people you need to tell them your story, I wish you luck, but remember, YOU have to fix it. No individual profession will take control of it and tell you to see the other, you have to do that.