Im having slight bleeding and brown discharge a week before my period is supposed to come. Ive been more tired than usual, having food aversions and cravings, dizziness, mild cramping accompanied by the spotting, doing things like walking up the stairs makes me extremely tired, ive been peeing alot, im really hot most of the time and sweaty more often and im beggining to worry. Im only 17 and i am scared that i could be pregnant. Someone help.