"i wanted to warn others of my experience. i have used plan b before and nothing happened probably because i wasn&#039;t ovulating. on april 11 i ovulated and had sex, 4 days later i took plan b. i know this is not how you&#039;re supposed to do it entirely but i&#039;ve heard of you&#039;re already pregnant it doesn&#039;t affect anything. a month later i found out i was pregnant and it was an ectopic. i&#039;ve never had an ectopic pregnancy before and i have a child so i can carry a full term baby. it&#039;s just a thought but i think plan b caused my ectopic."