Has anyone gotten a BFN after AF was due, and later gotten a BFP?

Tisha

My period should have started 3days ago, and I've been testing on and off from a week before (i'm addicted... yes. to peeing on a stick.) All have been BFN. I'm aware that the chances are slim that I am pregnant with negative tests at three days late, but I wonder if anyone has ever gotten the BFN days into a missed period only to gate a late BFP. With my son I tested a week after AF and there it was, but I don't know how it would have gone earlier.