"i wanted to make a comment on here to ease the mind of anyone worrying possibly! this is the third time i have had to take plan b and it worked 100%! i am 19 and on wednesday night around midnight i had sex, the condom broke and we had no idea and he came inside me fully. i didn&#039;t take plan b till about 11am the next day. my period was supposed to start 4 days after this incident so now i had taken the pill and was freaking out that i might miss! well good news! one day late my period came! a little lighter than normal but it&#039;s here! i&#039;ve taken the plan b before where my period was over 17 days away and it was the worst wait of my life! today i am getting an iud put in! do not stress ladies. stress could actually delay your period even more"