Scared teen

Okay so I know I was being stupid by having sex but all humans have their needs. But two days ago right after my period ended I had sex. I was on top and the guy failed to tell me when he was going to cum. So he came inside me and I’m not trying to have a kid. I’m on the daily pill but I have been late by a couple hours sometimes. The guy won’t buy me the plan b pill because he thinks I’m not going to get pregnant. Do you think I should be fine without the plan b?