so due to pcos i typically done ovulate properly, but this cycle after I had unprotected sex twice during my fertile window, I started having serious ovulation symptoms "cramping, spotting". it started a few hours after the last time I had sex during my fertile window. 10 days later I started spotting brown. extremely light, was basically only when I wiped. i wasn't due for my period for another 6 days. now I'm due in one day, and my cervix is soft and high. what were the chances that I had implantation bleeding???