AF Late

Brittany
So AF was suppose to show up on the 6th but hasn't, I've had some slight pink discharge but it's only when I go to the bathroom and wipe, then nothing. I had that for a day and now I'm having a light brown discharge. I've taken a test on the 6th and got a BFN. This is completely odd for me (especially both discharges), does anyone know what this means.?