I have a bad headache. i get them atleast once or twice per week. they sometimes make me feel a little drousy and nauseous but i am never really sick?

Probably migraines: The most common cause for frequent headache in an otherwise healthy individual is migraine. Oftentimes these can cause nausea, light sensitivity, and fatigue. Although you might think that you are too young to get migraines, many patients have had them even younger than you. There are good treatments available; a neurologist should be able to help you.