Hi there
I sympathise as I have had nearly daily headaches for about the last 15 years. I have had every possible therapy/ medication out there without success. My neurologist requested a brain scan, which did not explain the headaches, but DID show three small brain aneurysms for which I am now being followed. They would otherwise have gone undetected. Please reconsider the brain scan as it is safe and could explain your headaches. Take care