Ovulation peak

I've been having dark OPK since 10/9 to 10/11 so it's hard to tell the exact date I ovulated cuz Premom kept reading them differently. I BD basically all 3 days to be safe. Did I miss the window since when its peak, it means you will ovulate in 24-48 hours. I almost feel like after the darkness is gone, I should BD. Now, I'm like did I miss the window?!? Any thoughts on this?