I'm using the clearblue digital fertility tests. My AF ended just 2 days ago. Yesterday I had a low fertility reading and today I had the flashing smile which means high. In turn, Glow has moved up my fertile week and my next AF due date.  This happened last month and appatenly I wasn't ovulating because my AF came at the original time. (Every 27 days) After my peak reading last month (which was four days after my AF), I continued to test just in case. 5 days later I got yet another Peak ovulation reading. Because of my DHs schedule, we only BD'd on that test day, so obviously we didn't do it enough to get pregnant. Why is it showing me high and peak fertility so early when I'm obviously not ovulating until the following week? Has anyone had this problem?