Is it possible to ovulate on

Day 21 of a 26 day cycle? We haven’t had sex in 3 days so I’m guessing this can’t be leftover semen. It’s also in my urine.. it floats rather than sinks (if that matters)

I’ve been having frequent urination but I don’t have a UTI so I was hoping that was an early

Pregnancy sign until I saw this :( Is this most likely left over semen or fertile CM