Oh I agree that there are many other causes of headaches!

Have you had your eyes checked?
If not your vision, then it might be the posture or position you end up in when you study!

Foods and inhalents (smells) can cause headaches especially if you are allergic to them.

Since you get a headache every day...try keeping track of what you were doing --or what you ate or drank or what position you were in or where you were--- right before--or two hours before (write it down and keep track.)

It could be something "simple" like you're allergic to say, kapoc, and the pillow you prop yourself up upon is stuffed with it.

I would not do the neurologist/psychiatrist thing until I had searched out everything in my life first!

Good wishes!