I'm 18 and I'm not on birth control. I have my period right now and I'm on the tenth day (yikes). I'm normally pretty regular. I normally last about 6 days. But today being the tenth day I have started to worry. It is still very heavy. In my normal cycle I'm about as heavy as I am the second day. So I don't know if anyone has any idea why this could be happening. Anyone have any advice/information? Thank you very much.