going off the pill

so i've been on the pill for around four years now, the reason i was on it was because when I was 12 and first got my period it was three weeks long and the doctors were sure i have pcos, but lately i keep forgetting to take it and i've noticed that from year 7 before i started the pill i was super skinny and the next year i got bigger than everyone else did, so i've decided to go off it and i was just wondering what happened to anyone else after they went off it? :-)