I am 17, i started my period on march 10, and on march 22 i had sex with my boyfreind, about 3 weeks later i started feeling tired and nauseus, a took a hpt but it was negative. Then on april 23 i started spotting it was very light and only last for a few days, i dont kno if that was my perioud or not becuase my period normally lasts 5 days and the 1st and 2nd day are really heavey. I have still been feeling sick, ive had these wierd cramps and im moodier than i normally am. i think i am pregnant and i dont kno what to do..please help me