Pregnancy test

Rachel
Has anyone got a negative pregnancy test a few days before AF and then got a positive after AF was due?
I have two kids and I was adamant I've felt all the signs the irritability sleeping, peeing, feel hungry all the time, sore breasts and a few other symptoms however taken pregnancy tests today negative.. AF due on Friday, but yesterday I did have slightly pinkish discharge which I've never ever noticed before..
Feeling confused...