Could I get pregnant from unprotected the day before a missed pill?

I was just wondering my chances of getting pregnant. I had unprotected on a Saturday and Sunday night I forgot to take my pill before bed. I have never missed a pill before and promptly took my pill Monday morning (approximately 8 hours after I should have) What are the chances I could get pregnant from the day before. I did not have after I missed the pill. I have also been on my pills for about 7 months.