Has anyone at all had this <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> tell you your ovulating on certain days and then on the last day change it? Cause it said mine was critical days of ovulation on the 16 an 17 and then last night it changed it an said that my critical ovulation days were the 14 an 15. I was like, why did it do that. Cause we didn't have sex them days. We did it on the days it said. I'm really up set now cause we're trying so hard. I'm not really good at tracking my period and ovulation days so this was working great up until that happen . Has anybody else had this problem?