Hey, I have this <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> and it said I ovulated last month on the 9th-13th  and then I had sex on the 15th and was supposed to get my period on the 26th but I missed it.. But I think because I was stressing about it and counting the days and googling every minute and crying. What do you guys think ??