Have you had an MRI done on your neck? Many structural issues don't show up on X-rays. I have neck problems that cause migraines that several chiropractors never even noticed in their diagnostics. In fact, I learned it was dangerous to have my neck adjusted. One wrong move and i could have been paralyzed. I found out there is a surgery that could probably help me but, since it is done by a private clinic and doesn't bill my insurance, I can't afford it. Wishing you luck on getting the help you need.
If you, or any other readers, have time, would you be so kind as to complete my brief migraine survery? http://migrainesurvey.blogspot.com. Thanks and blessings to all!