Pls help...😭🤷🏻‍♀️

I want to loose my virginity but I can’t get on birth control. So the “plan “ is I loose it a few days before my period since I heard u are least fertile, and I’ll use a condom. I just want to do it already but I’m scared of pregnancy. Would this work ?about how high are my chances of getting pregnant with this plan I have in mind. Cus it gets me mad how girls have sex unprotected without bc and rely on the pull out method and still don’t get pregnant while others have their condoms break and get pregnant or they get pregnant with precum . But idk maybe they’re using or doing it wrong.

And don’t be rude I’m just trying to be safe and im a bit paranoid