hello and thank you for asking HCM,
I understand your concern. If the pill is not taken constantly, there is a chance to get pregnant but it also depents on the time you had intercourse. If you had intercourse in the time of ovulation, than there is a possibility. Ovulation occurs roughly halfway through your menstrual cycle, usually around 10 to 16 days before the start of your next period. If your menstrual cycle is 28 days long, this would be around days 13 to 19 of your menstrual cycle. So try to calculate the average length of your menstrual cycle and the date of your next expected period and substract 10 to 16 days to calculate if you where in your fertile period.
If you had intercourse in the time of your ovulation, my advice is to make a pregnancy
test a few days before your next expected period.
I hope this answer was helpful to you.