From empty circle to solid smiley

This is the first month that I use opk tests and got a bit confused at first when I got empty circles (low fertility) two days in a row in my supposedly fertile window. I was hoping to see a flashing smiley as the instructions indicate. Today is the third day of testing and I suddenly got a full solid smiley. Just wanted to share this in case there are other sisters out there who are curious about their empty circles just like I was. Apparently some of us don’t see those flashing ones but the real deal when the time is up😌