Hi... My periods come every 21 days I m due on the 7/11/12 but for the last 5 days when I wipe myself there is brown discharge? I m not on any contraceptive haven t been for about a year, I had sex on the 16/10/12 and didn t use protection but came on 2-3 days after my period only lasted 3-4 days, I ve never had brown discharge before my period only like the day after I come off... Can you tell me what s wrong with me?