Confused?,

I have this app Glow, along with the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> app, and my period was supposed to have gotten here 5 days ago according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> but Glow says I'm getting my period in 2 days. I downloaded 3 other apps right now to be sure, and it says 5 days ago as well? 
is this app wrong? do I get a test?