Did I miss my ovulation day? Any advice would be helpful!

Thought I ovulated on CD 15 but I just got even more positive opk on CD 18. We BD'd on CD 15. Do we still have a chance? Today is CD 19, going to test this morning to see if my surge is still there and we'll BD today. But did we miss our chance for the month.
CD15 at night
CD 18 at night