"just want to share my experience. i had unprotected sex twice on &quot;high fertility &quot; ovulation days ( very dumb i know ) took a plan b approx 60 hours after the incident two weeks late i got a very short (two day) period which was odd my period is usally 3-4 .following month i got my period on time &amp; full force . the pill does work ladies and i was ovulating at the time."