Implantation Help

AF is due this coming Sunday. I ovulated April 26-May 2 according to glow. I did not take an opk every day bc I ran out but when I did take them I never got a positive but the past few months I have been ovulating late. Anyways, sunday and Monday a few times I wiped it had a pink tint to it. I thought it was AF coming early but there is nothing today. Do you think it could have been implantation bleeding? We have been trying for almost 8 months.