I’ve been using Clearblue Advanced OPKs for over a year now. I’ve never had this happen and think maybe it’s a fluke. I got my first flashing smiley last Sunday and didn’t test again until Wednesday which i got a empty circle which means low. I tested again on Thursday through today (following Tuesday) and have gotten a flashing smiley. Could be test just need to be reset? Anyone have this issue? I don’t want to keep getting false results and wasting tests/money. Help!