When did I ovulate?

Hello all. I’m very familiar with bbt and use a fertility tracker that takes me Cote body temperature for me, so I know I’m doing everything correctly and my temps are skewed because of timing and what not. But, my period is late but I have negative pregnancy tests (obviously didn’t BD enough) but I’m so confused based on my chart. Did I actually ovulate CD16?? I did last month, and my average temps did rise, but it’s so rocky. And then it actually rose a lot higher on CD25. Any opinions? I stopped taking OPKs after CD15 because they weren’t anywhere close to positive, so honestly I think I ovulated later than FF says. I do check my cervix and CM, but I honestly have NO idea when because I don’t get EWCM even when I do ovulate. Ugh my chart last month was so much better 😩😩