Low then peak fertility

Alexis • Job 39:19-24 🩷Kenway Dawn born 11.27.2019🩷gym rat, passionate about lifting heavy. 🩵Bishop Garrett born 10.20.2023🩵

Is it possible to get low fertility, then just suddenly get a peak fertility, without any high fertility days? I’m so confused, I usually have a day or two of high fertility days before my peak but this month it was low.. then I just got a peak this morning.