"46 hrs after unprotected sex that occurred on day 14 of a 28-30 day cycle. it was within the ovulation window and the &quot;pull out&quot; method was used. had what looked like implantation spotting day 10 and a period 15days post, it lasted about a wk, heavy w clotting. it is now 6 wks after.. i did not end up pregnant! i did on the other hand have pretty intense side effects. first 24hrs; very fatigued, depressed mood, very painful lower abdominal area, and vaginal discharge from clear to creamy, yellow and burned. 2 wks after still had lower and pain and burning.  got tested, no infections. i had 3 ovarian cysts, and vaginal burning for 6 wks w no explanation other than it being from taking plan b. emotional well being is altered as hormone levels adjust back."