Frustrated and confused

Sarah
So AF was suppose to come yesterday(say 6/11) and I usually always start first thing in the morning but nothing. Pregnancy test was a neg. Again today nothing and a neg test. I feel like I'm gonna start with little cramps but all I get sometimes when I wipe is a little brown discharge. I remember feeling like this with my son but why the neg tests? Anyone ever had this and ended up being pregnant? Is so when did your bfp finally pop up?