Could I be pregnant?! Need many answers please!

 Okay, so I had unprotected sex last week on Sunday. I am on birth control (pill), but one week this month I couldn't take it regularly - by that, I mean at the exact same time. Some days I took it at 9 then took it at 11 the next day, but that was only for 5 days. The next week I had sex, 3 days after my week of ovulation. He pulled out, and I finished him off myself, so there was no chance of his actual cum getting inside of me, but it's his precum I'm worried about. He had peed since his last ejaculation, but I'm still worried. I'm on the pill (and have been for 3 months), and I usually get symptoms and pms about a week ahead of time and get my period on the 3rd sugar pill, but this time I have nothing. No symptoms or pms, that's why I'm freaking out. I was supposed to start today, and my period has been pretty regular since I started BC, but it's one day late so I'm scared. I know chances are low, and I know that I should wait to take a test, but I need to know if there is still I possibility that I could be pregnant. I am not TTC, but I seriously need reassurance. Please help me :(