Trying to time home insems with CBEFM. I have a regular 28 day cycle and yet I am still getting HIGH on the monitor and it is now CD16. This is my first cycle using it and I heard you can still get pg on HIGH days only but I am getting frusterated. Also, the dark lines seemed to have switched and now the line closest to the pee end is darkest. We insemenated my 3rd high day which was CD14 so what are the odds?