Please help with when I really ovulated

Bri • Sun, Apr 29

Hi guys can someone help me, I’ve gotten positive opk (ovulation predictor kit) (ovulation predictor kit) on CD12 & it’s been CD (cycle day)(cycle day) 18 & still positive. It’s been fluctuating on CD13/14 then back to positive CD18. Any idea where I ovulated?

TIA (thanks in advance) (thanks in advance) 🙂