Hiya I'm 17 years off age and I have my period since I was 12 , my period skips a lot and when I mean a lot I mean 3 months it's never on time and always late ,once it didn't come for 4 months .I'm getting worried because I have my period for the last 3 weeks .. it was there for two weeks and then went for a week and then I started again , I am sexually active but am not on any type off pill or haven't got anything put in and I am kinda worried about my future for having children I know it sounds silly for a 17year old to be saying about having children at 17 but I just want to know now so I can't do anything about it if something is wrong with me :)