depo shot and pregnancy 🤷🏻‍♀️🤦🏻‍♀️

I got the depo shot on Thursday ( I was on day 6 of my period and it stopped that day! ) me and my boyfriend had unprotected sex Saturday without a condom ( he put a condom on after like 2 minutes because I kept freaking out about getting pregnant 😅) and then we had sex again that night the same way. I know you can get pregnant off of precum and birth control isn't 100% effective, but what are my chances that I could be? And should I wait the 7 days before we have actual sex and him bust in me without being so paranoid? Thanks!