Getting headaches at a certain time, can this indicate a problem?

[ellen1]

Ok, despite all my other symptoms.. I seem to keep getting headaches at around 2:30 everyday. It starts throbbing, aching and hurting. It is a pretty severe and painful headache. It always happens in the same place.. on the crown of my head on the left side at the top in a smallish spot. I have been to the doctor to many times this year so i want to avoid going again. I have always been afraid of a brain tumor but i heard that brain tumor patients get there headaches in the morning. I have occasionally got them in the morning, but not that often. But i also heard you get brain tumor head aches in the same place to. Hmmmm, i'm never usually tense at the time i get headaches though, I am at school and i never have my mind on it.

What could this be? I don't mind if its just a short answer..