Breakthrough bleeding please answer‼️

So I take my birth control perfectly but on the 11th of August I had 1 mild trip of diarrhea 5hrs after taking my pill. However everyone says it has to be about 6 trips of severe watery diarrhea to even affect absorption. I took my pill as normal and 7 days later I had breakthrough bleeding of old blood heavy for about a week. I’m still a lil scared about the diarrhea and my protection but what are the chances of pregnancy in this situation?