Confused !

Anniyah • 25 Married 💍👰🏾 Muslim 🌙 Mother Of 3 👧🏽👧🏽👶🏽
I'm using different apps besides Glow and with all my apps it has different dates for AF 😩 which also gives me different dates for my fertile window my periods are irregular so it's hard to determine when Af is suppose to come it just make it harder when ttc 😒 with the different apps AF is suppose to come anywhere between the 16th and 24th