"my girlfriend took plan b on the 12th of may, 4 hours after our &quot;incident&quot; she didn&#039;t have any physical side effects but she did get very emotional. she would cry about everything - but she wasn&#039;t stressed about pregnancy. she got her period on 8 days later on the 20th. i&#039;m telling you guys, don&#039;t stress out - as long as you took it within your 72 hours, you will be fine. remain calm, put on your favorite movie and think positively!"