lost virginity, not sure if pregnant

Tatiana
I'm 15, I just lost my virginity about a week ago, and I'm paranoid I may be pregnant. We used a condom, it didn't break, I'm just scared of precum. As if it was on it before he put it in or something.. I was supposed to get my period this week but so far nothing, I hope it's a late period and I actually didn't miss it.. someone please help:(