Don't they teach kids these things!? The "PULLOUT" method is a myth. Since you're all so candid about your sex life, lets be candid about how babies are made. Sperm. Sperm continually comes out of the penis throughout sex, not just at ejaculation.
ALSO (since I'm feeling generous) another myth, girls CAN get pregnant while they're HAVING their period. Stick both of those in your front pocket, because they don't belong in the back pocket with your old, unused condom.
PS - Plan B is just a dose of the birth control pill. There's nothing magical about it. Also - it can take up to a week for your sperm to travel all the way to her egg. So have fun sweating that one out.