"i had  sex with my boyfriend the same day as i ovulated. i knew i was ovulating by the date and by observation. i keep track of my period and ovulation religiously. he did not pull out and went inside of me. i bought the plan b pill about 20 hours after the accident. the only side effect that i experienced was minor cramping 7 days after taking the pill and my breast were a little swollen. i started one day early and experienced little cramping. i was terrified that i was going to have horrible cramps from the reviews that i have read. not the case for me!!! i definitely recommend plan b if you suspect that you may be pregnant."