"so, i took this after the pull out method. he didn&#039;t come inside me, but since i&#039;m not currently on birth control and the possibility for pre-cum to contain sperm, i took this. i would also like to point out i&#039;m way above the weight limit for what this works best at, i weigh 220. my period came the 1st of that month and we had sex on 12th. took plan b the next day, over 24 hours later but still within the three day timeframe. i didn&#039;t experience any side effects until two days later, and it was only nausea. today is the 20th and i woke up to period cramps and light pink bleeding. i&#039;ll take a test to be sure since we also had protected sex after plan b, but i think i dodged a bullet."