Going to have sex the first time

May 7 is when I see my boyfriend again & we've been talking about sex so may 7 is 3 days before my period he's obvi wearing a condom but if he wears one & pulls out what's my risk of pregnancy? I can't go on birth control mom doesn't approve of it & I personally don't want to either I don't want hormones & if I don't want that then there's implants but don't want that either. Even with birth control I'm smart enough to use condoms still