"so, the boyfriend and i had a slip up when the condom broke and he finished before we knew the condom had broke. almost exactly 24 hours later i took plan b one step. i had felt fine until about 2-3 days later i had experienced mild cramping and nausea. this eventually left.  when my period was due i had sore breasts and mild cramping. i was a week late. it&#039;s normal. when my period finally arrived it was the worst cramps i&#039;ve ever felt. the blood was dark brown and eventually through out the day turned dark red. it is a very heavy flow. do not worry if you&#039;re 1-3 weeks late guys. maybe take a pregnancy test after a week of a missed period. this pill is highly effective. good luck."