i'm 16 and i'm considering going on the pill. my periods are always late and it's been seriously stressing me out. and then when i do get my period my flow is super heavy and i get horrible cramps and headaches. my period usually lasts around 6-7 days. me and my boyfriend are also becoming more sexually active. we haven't actually had sex yet but we probably will soon and i want to be safe. i just want to know your guys' experiences with the pill and what are the chances of me getting pregnant while on it