So out of curiosity I'm due for AF in four days but today I had gone to the bathroom at work and everything was fine. Then I had to go again and it was fine but the second piece of tp was pink. So I go out to my truck and get my only tampon since I wasn't expecting AF so soon. I get back inside and go to put it in and a whole bunch of the pink blood comes out. What causes light pink blood 4 days before AF? Like could it be that my body adjusted to where I start today?