10 pts! Headache question?

Okay, I am a 15 year old female, and for about the past 2 months, I have been getting mild pain on the left side of my head. The pain is always in a pinpointed spot, but the spots where the pain are vary. Sometimes I get these pains on the right side of my head. The headaches have not been getting any worse or more frequent, and I haven't been dizzy, nauseous, or anything like that. I am really worried that I have a brain tumor though. The pain seems to get better if I get a lot of sleep, but I'm still worried. I'm going to the doctor in a few weeks, but I just want some opinions. Thanks!!!