Sometimes I think allergies, change of weather patterns ( fronts coming thru) can cause painful headaches like this. I know I get them. Also could you have a sinus infection? Extra stress going on in your life? Maybe trying to reduce this as much as possible will help? Otherwise get to the doctor and see what could be going on. Thats all I know to say to try to help. Hope it stops soon and you feel better sooner than later.

Hugz
Beth