Testing multiple times a day mess up the test?
I received a flashing smiley face on day 15 of my cycle, I read online you can test more then once a day after getting a flashing smiley face to be sure you don't miss your peak surge. I'm on day 19 of my cycle and still having a flashing smiley face. Could testing more then once a day messed up the digital reader? Should I continue testing with the same tester? After I read that testing more then once a day could mess it up I bought a new kit on day 18 of my cycle and I used the new tester and old tester on the same first morning urine and on the tester I used more then once a day I received a flashing smiley face, but on the new tester received an empty circle? I'm so confused,please help clarify