Possible implantation?

Based off Glow I just finished ovulating, however if I go by cm I have not been ovulating this week. Last week, the 15-17, I had really heavy ewcm with a tinge of pink. Pretty sure that was my ovulation window. We did do the bd then. I am now on my second day of a light brown, sticky cm. could it be implantation, or am I just not correct in my cycle?