Okay my period was the 17th to the 21st. My most fertile days was the 26th - 31st, 31st being my actual ovulation day. I had started aygestin on the 26th, and didn't realize I was ovulating till two days ago. I had unprotected sex w/ my boyfriend on the 26th and 28th so I stopped taking the aygestin to be on the safe side until my period comes. Well today 3 - 5 days after having sex I noticed I'm bleeding very mild cramps. Its not heavy like my period normally is and is between dark red to barely brown color. What is going on? I only took the aygestin on the 27th and 28th once I noticed I had unprotected sex, I stopped. I'm not supposed to have my period for another 9 days and its always regular. I'm a mother of two never have expierienced this.