I had my most recent period Jan 4 til the 8th & I had unprotected sex on Jan 8 BUT he pulled out before he even came. I am normally 35 days (cycle) and my most fertile days were Jan 20th-Jan 26th... I ovulated on the 25. I recent started working out twice a week and my period was supposed to come Feb 8 and it's still not here :( BTW I had very very light spotting from Jan 24-26. I also had sex on Feb 5 but with protection.