Early ovulation??

It’s my first month trying opk and I’ve yet to have anything even close to a positive. I’m CD 16 today.

Around cycle day 8 I had Ewcm, and cramping through to CD 11. The opks during those days had a test line, but not dark as control. The tests since have all been a barely visible test line.

Does anyone else have any experience with potentially ovulating this early? I’m still testing until af comes, but I’m thinking I may have been missing my fertile week for the last 7 months by almost a week!