The <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> period app says my period should have started today , but glow says not until Thursday, <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> got my period info from glow so now I’m confused ! Should my period have started today or Thursday , I usually have a 27 day cycle if my period was to come Thursday that would make it a 29 day cycle ! Last period was 8/16/18