What day was ovulation?

I had my first positive opk on Saturday, 3 days ago. Yesterday, Sunday, I had a 'peak' test and we BD mid morning. I am guessing that my chance is low because we only BD once this cycle? Chart attached.

This says I am 3dpo today, and I feel like we may be high risk for pregnancy. I thought you ovulate within 12 hours of your first positive test and the egg is good for only up to 24hrs. 😵‍💫