So I'm currently working with a few apps and according to one of them, I'm 3 days late. That app is just a <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> and not a fertility one but its been tracking my period for over a year now so it's very accurate. Should I test? Or wait until I'm late with the other apps I'm using on the 19th????