"i took this pill after 24 hours of the accident. 5 days later i got what they say is a &quot;plan b period&quot; even though i got that i was still stressing think of the what if&#039;s, the next month my period was late 7 days late in fact but it eventually came. i am so thankful for this pill. what i learned is don&#039;t stress if you take the pill directed you will be fine. the only down side was i got extremely tired"