I'm 15 and I came on my period the other day and it is usually about a 35 day cycle and the bleeding is light and lasts 6 days. So it came ontime and was all normal but then it only lasted 1 day and then stopped. It is impossible for me to be pregnant because I haven't had any kind of sex at all in my whole life. I've not told anyone and I've never even told my mum I've started my period but I've been having them for over a year now. Does anyone have any answers ??