"hey! i decided to write a review to put some peoples minds at ease.  i had unprotected sex march 17th and i took plan b march 18th (20 hours later) to be exact. six days after i experienced spotting for a couple of days my period was supposed to be here april 6th and it never came. i wasn&#039;t too worried at first until i was more than a week late so i took a pregnancy test and it was negative, today april 21 i finally got my period i know it can be nerve wrecking but be patient! hope this helped :)"