Opk positive 2 days

So I had my first pos opk on July 4th. AM but not fmu. Checked again that night to make sure it wasn't getting any darker. Same. Then I was positive again on the 5th and today. Yes, I know they say to stop testing after first positive but I was trying to watch for it to turn negative so I had an idea of the window. We had sex the 2nd, 4th, and 5th just to be sure and bc, why not? 😉 chances are I ovulated the 4th or 5th...right?