Just wanted to add a personal experience:
I had frequent headaches when I was younger. Began only occasionally, grew more frequent (once a month) then to once a week. I spent a lot of time in the nurses office... and had many grandparent trips to pick me up or drop off medicine.
In 6th grade it came to a head. I basically had a migraine that lasted for 6 months solid with no break. They ran every type of blood work possible, did every scan.I was sent to one of the best neurologists in the nation to no avail. Even sent me to a psychologist to see if I had school phobia ( I didn't, big shock). Couldn't find anything wrong. They finally concluded that the headaches were just my lot in life and the 6 month bout was onset with viral meningitis. They hospitalized me and gave me some strong meds for a week to break the headache cycle.
I still get headaches every now and then, but usually just once a month or so unless I am pregnant or sick. And now when I get one I take two tylenol with some caffeine (makes the meds work faster and better) and lay down for 30 minutes and they are gone. Most of my headaches are triggered by weather changes, or hormones, or sinus pressure and I rarely get the terrible migraines I used to.
Don't worry so much! It could be something bad, but it might just be normal, or something that will peak and then retreat. Have faith, and good luck!!! I am fine and hardly notice normal headaches now, but I am sure it freaked my mom out back in the day.