9 yr old son with headache 2 weeks, begs for lights off

Sudden onset headache-
Little background here. Has arachnoid cyst, that has been not doing anything for over 5 years. He wears glasses for eye turning in.
Took him to ER after day 3 because my mind wouldn't rest knowing about the cyst. They did scan told me not cyst related, no swelling in back of eyes and cat scan didnt show any sinus infection or change in cyst. Took him to pediatrician medicine to lower ear pressure, - no change after that round it was Antihistamine at night but that helped him sleep night 1 but even after 3 nights he still isnt sleeping well.
Had him not wear glasses for couple days to see if maybe related. and took him for eye exam thinking maybe it was vision related. Told not related. He has missed school and the one day I did manage to get him in there he was home within the hour. When its really bothering him he is begging for lights off.
He tells me that it feels like squeezing. What could this be?
I scheduled an appointment with a neurologist but that is not for 2 weeks.

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