I’m not, am I?

Hey guys;

So me and my boyfriend had protected sex on Thursday (29/03/18). My period was meant to be due the next day, but there was no show. It has now been almost 6 days and I’m just a little anxious. I know I put the condom on correctly and he says it didn’t rip - but the condom was our only method of birth control.

Is there a reason why my period is late? Should I be worried?