Need help with OPK

Megan

Hey everyone! Trying for baby #2. It took 7 years to get pregnant with him and it was totally unexpected/ a miracle! He is 2 and we are wanting to try for another one, but since we had pretty much given up and quit trying when we got pregnant with him, I feel like I’m new at this tracking thing all over again lol

I have been using Clear Blue OPK’s and got a solid smiley face this afternoon at noon. Baby danced (we are in vacation so the timing worked out lol) but then got curious and took another test tonight and the circle is just empty again.

Is this normal? Should I test again tomorrow at noon and see what it says? Just trying to figure this out.