Why is this happening on glow

Question

So yesterday it said 22% chance of pregnancy and two day or says 8% chance dose any one know why it is doing that

Answer

Oh OK thank you this is my first time using this app and I just got this app I think 4 or 3 days before I started my AF last month so thanks for helping

Answer

Your fertile window is ending, you're becoming less fertile.

Answer

I think that's normal if it's your last day in your fertile window?..

Why is this happening on glow

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