When did I ovulate?

Kate • Baby #2 on the way! “Geriatric” maternal age.

I know I should have also checked my bbt but I didn’t.

Do you think that line on CD 19 looks dark enough to have been ovulation? I usually ovulate on CD 23-24 but those (and CD 25, today) have all been negative. It would be very strange to ovulate even later in the month.