PCOS possible implantation????

Nov 1st I wiped and there was light pink discharge when I wiped again it was gone, today I went to the restroom and it was a darker pink when I wiped two more times there was still pink, I have PCOS so I have irregular periods and no period since august, is implantation always a dark brown or could this possibly be implantation? I am sexually active so pregnancy is a possiblility but would like to hear experiences with implantation bleeding?