Plan B is a great medicine that saved me more than once when the condoms broke. It's really easy to use and you have as much as 72 hours for it to be effective.  

If you ever have unprotected sex for any reasons, you can still prevent pregnancy after it. I always like to be sure I can avoid unwanted pregnancy, or, even worse, abortion with the help of Plan B.  

Sometimes it may happen that you get so carried away and don't even think about contraception. When such a thing happened to me I used Plan B and everything was well, I didn't get pregnant.