OPK results with clear blue advanced digital

Bryanna

I have a question for you all... so yesterday I took a clear blue advanced digital ovulation test the result was the circle which is low fertility: small chance of getting pregnant. Today I took it and it skipped over the flashing smiley face that means high fertility: increased chance and went right to the non-flashing smiley face that means that I am at my peak fertility: highest chance of getting pregnant. Is this normal? What does it mean when it goes from apparently no LH surge to Peak in a day!?!? Any help would be greatly appreciated. I just turned 41 and trying on our own after failed IUIs

O