Clearblue digital ovulation test

This month, my ovulation test went from an empty circle (low) directly to a still smiley (peak), with no flashing smiley in the middle. That's never happened before. I tried to verify with walgreens brand strips but I'm not getting any lh surge on those. Anyone know what happened? Did I miss a couple of days of "high" fertility, or should I retest when the smiley goes away? My cycle's sort of weird this month because of a chemical pregnancy last month. Thanks!