"i&#039;m young and inexperienced w/ sex so when we decided to not use a condom i thought it might be worth it since i knew about plan b. let me tell you guys, don&#039;t plan on plan b instead of condoms or other forms of birth control. i thought it was a good option (and spoiler alert: it worked!!) but i really regret relying on it. i waited about 20 hours to take it &amp; the next night i realized the day we had sex was my most fertile day (my ovulation day). then i read a bunch of articles online about plan b being ineffective if taken during ovulation &amp; i had a lot of pregnancy symptoms: bad cramps, tender breasts, bloating, dizziness. i got my period 5 days earlier than scheduled after freaking myself out and feeling like absolute crap. never again."