Pregnancy?

On July 7th I had sex. This is my second month take birth control and it was my 8th day on it for the second month. I took the pill on time 30 mins after sex. I’ve never been late taking the pill and I used a condom. I know there was precum in the condom. My period is supposed to come tomorrow but i’m panicking and I don’t want to get pregnant. Is there a chance I could be pregnant?