Late period - condom and pulled out

So this month my boyfriend and i had sex a couple times, condom didn’t break and he pulled out before he came each time. He tested the condom multiple times afterwards to make sure there were no holes and it was all intact and we were fine each time. But my period is a day late. My boobs hurt though and I have pre - period cramping like I usually do, but still no sign of it. I have pretty bad anxiety and I’m thinking maybe me stressing about being pregnant is what is delaying my period. Could that be it? We are super cautious and were always protected every time we were intimate. Please help!!!!