Headaches...

I am prone to headaches/migraines prior to my pregnancy. This is baby number four and I know they get extremely worse during my pregnancies. I've had a constant headache for two weeks now. It got so bad it woke me out of my sleep twice last night. Its a pounding/pressure behind my right eye. I have a checkup wed and I can't reschedule for a sooner appt with my doctor. Is there anything I could be doing besides stilling hydrated and taking Tylenol??