"i had unprotected sex august 29 which was a monday and after we finished he told me that he came inside me, and let me tell y&#039;all i was fertile and i ovulated on wednesday!! well i started freaking out and took the pill 40 min after. tuesday morning i did feel some of the side effects but nothing too major!! your period is either going to be early or late but i wasn&#039;t supposed to get my period until 2 weeks from the day i had sex. fortunately i got it early six days later so it does work!! also they say that if you weigh more then 160 or so it won&#039;t be as effective and well i&#039;m a pretty curvy girl i weigh 250 and it worked on me so don&#039;t believe that stupid theory!!! hope it was helpful!!"