IB or early AF

so yesterday i had some very very light pink discharge, only once, but i figured it was AF showing up so i put in a tampon. when i got off work I went to take the tampon out and nothing! it was almost hard to pull out because it was so dry. then this morning i checked my cm and it was pink. i've checked it a couple times and it's still pink. it's not enough to need a panty liner and it's not even there when i wipe- only when i check. AF is due Saturday and i'm around 11-12dpo. i've had kind of a dull pulling/cramping feeling this morning as well. thoughts? 🤷🏼‍♀️