Dr. Leela usually gives good advice. I'll just relate an anecdote for what it's worth. A few days ago I felt a suspicious headache coming on, and I noticed I was feeling strange is if maybe this was a fever headache and not the usual headache from over-sleeping, missing meals, etc.
So, I took Oscillococcinum--the flu remedy, and darned if everything didn't just clear right up!
Everyday miracles.
I guess the point I'm trying to make is, sometimes the specific symptoms of the headache aren't as important as the state the headache is a part of: Grief? Anticipation? The flu? Sometimes, that might be the place to start. That being said, it's probably still best to follow Dr. Leela's advice.

Snoopy