hi i'm 22 years old and have 2 beautiful children. i was wondering what could possibly be wrong with me, i had my period on aug. 29th and it lasted until sept 5th, very normal. but then almost a week later i started bleeding again, but it wasn't a normal bleed, it was brown and just enough to get on the underwear. it lasted for 3 days and then stopped, any ideas on what it could be?