Numbness on back of head with pain

Okay here I go.....   Last February I had a terrible headache.  I was not prone to headaches and this one would not go away and was just horrible.  Then the headache turned to numbness and tenderness on the back of my head.   I went to every doctor known to man ... and guess what... I was pronounced healthy by a neurologist, eye doctor and allergist.  I had multiple tests ranging from regular CBC to C reactive Protein to Vitamin. B, C, D, Magnesium, and Calcium tests.   The only thing I know is I still have the numbness and I have nothing secondary!   I can move my neck and back with full range of motion.   I have been put on Topomax, Lyrica and they just make me tired and heavier.  The only thing that seems to work is pain pills, which just mask the pain.   Oh yeah, I went to a chiropractor who wanted to see me 4 days a week.   Is there anyone out there who understands or is going thru something similar?    Thank you