"my boyfriend and i had unprotected sex around 11:30 p.m. on 12/3, and i was due to ovulate on 12/5. he claimed that he completely pulled out before he ejaculated, but i wasn&#039;t completely convinced. the next day, around 7:30 p.m. (20 hours after the act) i took a plan b one-step. since i was so early in my cycle, i knew i would have to wait a while to see if it worked. i did not experience any symptoms until about a week later, when i started having sore boobs, headaches, and light brown spotting that lasted a couple days. i was due for my period on 12/21 and it came a day early on 12/20. for everyone out there worrying: stop! if you took it within the suggested time frame, it will work!! relax and let the pill do its job :)"