Help? what can be wrong?!

recently i have had some abnoraml things..for the past 2 period cycles i've had, my period came after only 3 weeks, rather then the 4 week cycles ive had for almost 4 years. i have been extremly tired and i have been falling asleep after school EVERY day, and not just a short nap, three hours, and i could probably go longer but my mom wakes me up, and also, i've noticed i have to pee A LOT!..even if im not drinking. the peeing and extreme tiredness have been going on for about 2 weeks. could this possibly be from an untreated bladder infection even if i dont have the symtoms of a bladder infection anymore.? im 15 and sexually active if that helps....what can be wrong.?Health Question & Answer

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