TeenHealthFX cannot diagnose you over the Internet. You need to talk to your doctor about this problem ASAP, especially if it is giving your trouble everyday. Often stress, allergies or eyestrain can be the cause of persistent headaches or even migraines. Your doctor should be able to give you a better idea of what is going on. The nausea and dizziness could be the result of the headaches. After your doctor has made a more clear diagnosis of what you are suffering from, you can then begin to connect with other teens your age going through the same thing. Your doctor can recommend some area groups or you can often find sites on the Internet that will allow you to contact other individuals with similar conditions - depending on what your diagnosis is.
If you do not have a doctor and live in the Northern New Jersey area, you can contact the Adolescent/Young Adult Center for Health at 973.889.6350 or Girl's Street - A Young Women's Health Program at 908.522.2555.