So I get my period out of no where. The last period I had lasted 3 months!! !! Then three weeks later (November 24,2015) I got it again and still have it 16days later!! I'm 17 years old and I've had my period since I was 13. What should I do? Everyone tells me I have PCOS (polycystic ovary syndrome) and that I should go to the GYN. I'm honestly scared to go.. Is there anyway I could somehow shorten and regulate my period? Birth control?