Epilepsy and constant headache since June

I am 25, have had epilepsy since age 9, two temporal lobe resectionings, VNS, multitudes of medicine.  In June I felt what I thought to be seiure activity, began a 3 day dose of lorazepam per neurologists advice.  Thereafter, I began having a headache on the top of my head.  Since then I have taken two rounds of prednilizone, two weeks of but/acetomenophene/caf, days and days of advil, a CT scan, EEG and still have the headache - don't know whether it is a seizure, migraine (no aura or nausea).  Has anyone experienced this and did you find any help?  Thank you so much!