I had this same situation happen to me. I suffer from migraines ( I take a migraine preventative). I was diagnosed with narcolepsy 7 years ago. My neurologist (he is a sleep specialist) prescribed Provigil and later Nuvigil.They produced the same initial side effects- a mild to medium headache- I wanted to stop taking it due to my history with migraines, but my doctor told me that the headaches were a side effect and would go away with use. He said to take ibuprofen! It actually worked! The headaches went away within a week.