Guys I need your help. I'm totally confused. After being late with my period, it came but only for a day. I did a pregnancy test a week after but it's negative. Did another one 5 days ago and still negative so I thought I'm not pregnant it's just weird one day period. But my breast still fuller than usual. Then just now. I peed and I saw my panty (sorry TMI) with dark brown blood. When I wiped it's light pink now. Since that one day period is day 1, today is day15. What is going on?