I have a regular period and it last 7 days. Now my period came on Aug. 3rd, "period before that was July the 4th-11th" but back to my last recent period... It was like a period for the first three days but the 4th day I noticed wouldn none but a little on the pad when I woke up I thought none of it but hmm then I decide to put on a pantyliner wouldn none on my pantyliner right off but I notice I was spotting blood at first then it changed to a kind of light brown and a dark brown the rest of the days... That's very weird to me cause I don't recall my period doing that before. Do you have any suggestions on why my period doing this.

Are you sexually active? How old are you?

Are you sexually active? How old are you? yes I am 17 . But the last time I had sex was what July the 15th .

If you miss your next period, wait two weeks and take an hpt. If you period is still weird, make a doctor's appointment and get checked out. I do know (especially teen) periods can be weird and irregular.