I think you are suffering from a type of migraine headache.
Acctually, 20% of all migraineurs have their first migraine attack before they are even 5 years old.
Is the pain severe throbbing headache at the back of the head on both sides?
Do you usually get visual disturbances starting in one eye, and then gradually spreading to cover the entire field of vision (leading to temporary blindness), before experiencing the headache?
Do you feel uncoordinated and unable to walk?
Are you experiencing ringing in ears, prickling sensations in your body, arms and face with changing levels of consciousness?