AM I PREGNANT

So my boyfriend has erectile dysfunction but it sometimes works and he usually just comes around my butt cheeks and we wipe it but one time I wanted it in since it seemed hard enough so we put it in quick without a condom and now I'm worried I'm pregnant, I took a plan b the next day but my period is one day late but it's usually irregular so I'm not sure what to do. I'm 16 and don't know if I should go to doctor since it seems to early