You might need glasses I used to have terrible headaches they would hurt so bad i would cry and turns out I just needed classes I thought I saw everything normal but when I got glasses and huge difference my headache went away and I saw better , I did not even know I needed glasses
It could be any of the different kinds of headaches. You should probably get it checked out. Tension or stress headaches feel different then cluster headaches which feel different then migraine headaches. Your Dr will know... and be able to treat you accordingly.