Could i get pregnant with sperm on condom as the story puts it? pls help 15 and confused

I got my period on the 31st of october and my bf and i had sex for the first time on the 18th of november.He accidentaly ejeculated a bit early so we decided to continue and but we decided to change the condom just incase it bursts inside me.now im scared because as he changed it he might have caught some sperm on his hand and transferred it to the new condom he was about to put on(which then eventually went inside me).I still haven't got my period and i have no period symptoms either(and no preg symptoms).I caught a cold last friday and had some fever could this be what delayed my period? im quite irregular but most of the time it comes early. i know i shouldnt be stressing out but i'm a bit confused even since i got no period symptomsm like tender breasts(but i got the ''period pimple''...what do you think? :'(