"this works. let me cut to the chase: i am normally very careful when it comes to protection, but accidents happen. my guy and i had sex once with a condom, no ejaculation. then we went for round two without a condom. this time, there was ejaculation, although he did not get any inside me. i know that pre-cum is something that can potentially carry sperm so, to be on the safe side, i took plan b one step about 2.5 hours after. long story short, i could have been ovulating (very regular 28/29 day cycles) and, it&#039;s worth a mention, i am well over that supposed &quot;175 lb&quot; weight limit for plan b to work. all preg tests on days 24, 25, and 26 of my cycle are negative and today i got my heavy, heavy, painful period. no baby here."