What is this?

Ok ladies, so I absolutely do not use any prevention methods when having sex with my fiancé. We BD a few times during “predicted” fertile window. However, I do NOT track my ovulation whatsoever so I never actually know when I ovulate. I’m around 9-10 days away from my predicted period and this morning I got this! What could this be?? Implantation? Late ovulation? Any suggestions?? Been having lots of CM the last few days and then this, along with more CM this morning. Also a tiny bit crampy the last day or so.