period tracker

Courtney
so is everyone that has like a couple months down on <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>, are they always correct when you're gonna start? because mines been close and this month it says I'm 2 days late. I'm a virgin so I just wanted to know if like everyone's is right or almost, or even not at all.