Hi! I don't know if you still have issues with these headaches, but I think it'd be good if I shared my experience. Since I was three, I have had a shunt to combat Hydrocephalus, revised it a few weeks ago. The reason? I had been getting severe headaches, like when you don't drink enough water, for three months by then, cause the shunt was working 'too well' and causing too low pressure in the skull.

Not having a neuro team to consult sounds tricky, isn't there any clinic or so you can contact?