6 days late... then a 2 day light bleeding?

Amanda • 👨‍👩‍👧 Mom to a wild 4 year old

I was 6 days late on my period and since I been off birth control 3 months ago my period was normal and on time but this month I was late and then right after I had sex on Saturday i had a light bleeding like brown to light pink on my SO (tmi) and then bleeding starts light to medium and didnt fill the pad up at all and lasted for 2 days and stopped. What could it be, was it that I was on my period just short period or what could it be?