Okay, so I tested yesterday morning with my Clearblue advanced digital opk kit (purple top) and it was a negative. I never got a flashing smiley face, just the blank circle. Last night, I tested again with another clearblue advanced and I got a Peak positive. I tested again this morning with the original clearblue digital (pink top) and got another peak positive.

Is there a reason I never got a positive with the flashing smiley face?

Has this ever happened to anyone else?