I'm scared

Aby

So my bfs and I had sex on may 30th. I was supposed to start my period 3 days ago.... I'm scared that I might be pregnant. We used a condom and like he never like actually came that we could see.... What are reasons y I haven't started my period? Why would it be late? I'm thinking it could be cuz he fingered me like the day before I was supposed to start? Idk. Help.