Implantation bleeding vs light AF(tmi?)

Laura • After many long years I`ve found the love of my life n I`d love to give him a family❤️
I'm due for AF on 9/19. 9/10-9/12ish I had very light pink n brown mucus stuff when I would wipe n then it just disappeared. I have a lot of symptoms that could be pregnancy or AF. Any help from anyone who's experienced IB is GREATLY APPRECIATED!!