Period hasn’t showed

Lexus

According to glow and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> I was supposed to start today, according to others not until tomorrow. I’m 28 days around the clock and 3 months post partum. Yes actively trying to conceive. Should I test? Or wait until tomorrow considering other apps say tomorrow?