I was 4 days late for AF to show its ugly self and so the next day the 15th of aug. I started A little heavy looked like old blood and I called the doctor and she said it would turn bright red and well it turned dark red with some being bright red.... it only lasted from the 15th until 3:00pm the 16th and then I was spotting one time I spotted and it was pinkish with mucus and the last I spotted was two days ago and it was BROWN......AM I PREGO?? Was it implantation ???