If you missed13 days of birth control can you get pregnant?

Yes you can still get pregnant, but it really depends on what method you used what the chances of that happening are. For instance if you used a condom and it didn't break, slip off, or spill after withdrawing then you have a very low chance of being pregnant. Condoms when used correctly are very efficient. But if you used a method like withdrawal then you have a higher chance of being pregnant, again depending on whether the method was used successfully. I hope that helped :)