I just started my first month of birth control pills. (The yellow and brown ones) three Sundays ago. (Today is Tuesday) so I'm in the middle of the third week in my pack. I also started my period on the first day I started my pack of pills. Coincidentally. But I just started bleeding today. So if I go by my normal 28 day cycle I shouldn't have started my period for another 11 or so days? Is this normal for my first month of birth control?