Vania,

Mark has given some good advice. I think you should have your vestibular system checked and see a neuroophthamologist to see if there are any issues with your eyes. These can contribute to headaches. Also, seeing a pain specialist or neuro who specialises in headaches would be good. If your neck is not involved, and your eyes and vestibular system are functioning properly, it is very possible that you have post-traumatic headache (PTH).

PTH is not discussed in the concussion world, or even here, very often but many with chronic headaches who call it PCS likely have this. One of the hallmarks of PTH is aggravation of headaches with mental engagement.

As a fellow academic who used to oversee a largish research lab and program, I can empathise with your situation.

Anyway, starting by ruling the obvious out and determining whether your neck is involved is key. Too many assume the neck is an issue, and I've personally had experience in this. It leads to costly and unneeded overstimulation by chiropracters doing unnecessary "treatment".

Just my 2 cents