As far as I am concerned...anything is possible! Sperm can live outside in the world for a few seconds, but once it has made it in the vagina...it can live for 4 days in their!
yes ma'am and in 3 weeks I would taking a test. Anytime a man releases inside you whether it leaks out or not there is still a high chance of becoming pregnant. You can look into the morning after pill if you are not ready to be a mom.