I'm not sure what's going on beside me, do you know?

I am 16 yrs old and I haven't be feeling economically for the past couple days. Friday i have 2 leave college early because i have a major headache and i feel really dizzy. the next light of day was necessarily the same bearing just not as fruitless. and today, i almost passed out twice while i was within the shower. i've also been have a stuffy nose n sometimes runny. wat should i do n does anybody own any idea what could be wrong? Flu.
Insufficient sleep.
Poor nutrition.
Dehydration.
Iron imperfect.
Any of the above, individually or in combination, can wreak your symptoms.
Sounds like possibly a sinus infection. But you should really get to the doctor ASAP! You could hold any number of things like low blood sugar or possibly even be pregnant. PLease get to a doctor.