Is he cheating?

Found some condoms in his car. They were in his room before. None were used. Maybe he didn't use one Idk. Anyway he gave me some bullshit ass story of how they were for his boy who used his car cause his was broken down which I know is true about it being broken down but I don't believe him cause when he said his friend's girl's name it was the name of someone he messed with before me. I also found one in his drawer in his room but haven't told him about it. He has old ones but that one looked pretty new expiration date of 2022. Feeling like I should just leave him altogether. I'm pregnant and it sucks to be lied to. I don't deserve it.