My period is due 2/24 and i am new to <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> i regurlary use MyDays, but my period didnt come today as were TTC. But a Negative test. This app is now saying my period is due in March when i dont have a 38 day cycle usually only 31/32. Maybe 33! Im confused why it would push me back another week when i have logged my periods from the begenning of the year! Plus could i possibly be pregnant?