OPK and Ovulation Confusion!

This is our 2nd cycle TTC and I received 2 positive opk yesterday (CD 15) . This morning (CD 16) I received a negative opk. Does that mean that I ovulated yesterday or would I ovulate today?

This is our first month using opk and I’ve read such conflicting information so I’m not sure what to make of it all. I know the positive test indicated the surge and I would ovulate in 24ish hours after but I thought the levels remained high until ovulation, which would mean that I ovulated less than 24 hours after ... so even though I received a negative test today would I still ovulate? So confusing!