Nausea and loss of appetite in the mornings, 15 year old girl?

I feel nauseous in the mornings on weekdays(I wake up at 6 am on weekdays 10 am on weekends) and i usually don't feel like eating anything but sweet things like sesame chicken or gummy, fruity stuff like fruit snacks or fruit by the foot but not sugary things like doughnuts and stuff. This happened on and off and started December '07 so when I was even younger. I usually feel the worst when I use energy or have to lift my arms up to dry my hair. Then I get really tired. Then a few minutes after I get to school I feel bEtter but I still don't have an appetite for certain things so I buy fruitsnqcks for breakfeast. If you need more info just let me know.