Is it possible I could be pregnant?

Me and my boyfriend were messing around ( he was fingering me and i was giving him a wank) then he put on a condom and tried to put it into me but he went soft so we obviously stopped. I know it may sound silly but is there any possible way from that that I could be pregnant? My period also came four days after this happened but from what I’ve read pregnancy can still occur even if you get your period.