"i  had sex on the first day of the month. after we had finished he had told me the condom broke and he had finished inside me. i was not on any form of birth control at the time. immediately our first thought was plan b. i took plan b about two and half hours after i had sex. the pill was very strong and left my system messed up but to think positively i kept telling myself, &quot; it&#039;s because the pill is working&quot;.  6 days after taking plan b i got my period, it was a huge relief. try and focus on something else other than this, and do not worry until you know you need it. this pill is very affective."