Is it normal for your period to be weird after losing your virginity?

Hi, when I lost my virginity, my period was short (2 days) when it normally lasts like a week. It was heavy and had clotting, so I’m almost certain it wasn’t implantation bleeding. (We used a condom and the pullout method.) but now, my next period, was due yesterday and is now a day late and I’m having occasional cramping. Is this normal? I’m super paranoid and I’m only 16 and I really do not want to be pregnant now lol. (Please don’t judge me)