i am 15 and never have had sex but i crazy irregular menstruations. my last period was 1 year ago today. since i was 11 i have had crazy cramps every once in awhile but not actual menstruation and every month when all my friends are on i get all the symptoms head ace,pimples,sensitive breast and belly area. i had my first period in march of 2012. when i was 13. before this year i had 3 periods every months. please help me understand!