So confused

So I’m 5 days off my last day of fertility window. I had sex 2-4 times a day everyday with my husband as we are trying for a baby and my period isn’t supposed to come for 10 days. I have pcos idk if that makes a difference. My fertility window is was October 16th-21st with the 20th being my peak day. I have no clumps, it’s getting lighter bleeding, slight cramping (almost don’t notice it). I also was checking my cervix to see if they were soft and this started a few minutes later, but i didn’t push hard on my cervixs like I barely touched it so did I cut myself, start my period, or implantation?

Update- bleeding has stopped