help? could I be pregnant?

Okay I've been on birth control for 2 weeks and last night was the first time I've ever had sex so we kinda didn't know what we were doing. He wore a condom and but he cummed after like 30 seconds in the condom in me, I didn't realize he would that quick and then he pulled out and said do I change it, did I break it? And I looked and felt and it wasn't broken and I was like no you are fine. And then we started going at it again and it started slipping off and was like "wait did you already cum?" And he was like yeah and I got kinda nervous cause I'm scared if some got in me when the condom slipped could I get pregnant?