The more you stress about it, the more potential you have to throwing your horomones off making you start later. It's a chain reaction and stress is proven to mess with start dates. Just relax and get a home pregnancy test.
My boyfriend and I have always been safe when it comes to sex, 3 days before my period had to start, we had sex. I know the condom didn't break, I did the water test. As of today my period is 3 days late and I've been stressing out. Any advice?