Confused

Kel

My cycles are pretty regular period wise but this is my first time <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a>. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> hasn't changed my period date is when I will expect me period but Glow using my ovulation tests keeps moving my period so I wish I just knew what was happening x