Pregnant on BC?

I missed one pill by 8ish hours. Took it once I woke the next day and remembered. Haven’t missed a pill since. A week later (today) I spot. Very very very light and only for a few hours. I’ve never spotted on the pill whether I missed by a few hours or not. Anyone get pregnant on bc and have random spotting?

I’ll test if I miss my breakthrough bleeding in five days.