OPK seems off

Beth

I test every 12 hours. For the past 2 days I’ve had a flashing smile on the Clear Blue advance digital. I had a flashing smile this morning even. Well that test monitor up and vanished. I possibly threw it away. It was 6:45 am and I fell asleep at 2:30 am. I used a new one tonight and tested almost 12 hours exactly I’m getting the negative circle yet, this is my read. Seems to be detecting it here. Idk what going on. Anyone ever have this happen?