I have a regular 28 day cycle period usually last 3 days, third day being the lightest. ovulation occurred march 26-31, period was supposed to start april 12 period was four days late, had signs of pregnancy, when started bleeding flow was different then

Not pregnant: If you have bleeding then you are not pregnant. Periods can vary from time to time depending on many factors - stress, recent or current infections, antibiotic use, hormonal fluctuations. Keep a diary of your periods and if you start to miss periods, have excessively heavy periods or frequent spotting, see your OB/GYN or Family Doctor.