Could I be pregnant?

So this previous Friday me and my boyfriend had sex and he accidentally didn't pull out. I am on birth control and I have been since December. I meant to start my new packet of birth control the Sunday before we had sex but with the whole virus thing I couldn't get them until Monday, so I had to double up. I know that i did the right thing and it's probably fine, but I can't stop thinking about it. And I took every pill after that perfectly and I was 6 pills in before it happened. Has this happened to anyone? Am I okay?