Hello, I used my clear blue digital tests starting this past Monday and got the flashing smiley face all the way to Saturday. I bought a new test on Saturday because I ran out of test strips. Just to see I used both testers to see if I got the same result ( hadn't got the solid smiley yet) My old test gave me the flashing face and the new one gave me the circle. Now I have an error on the old test and the new still says a circle. What does this mean? Did I miss my surge or did I never had one to begin with?