Glow changed my cycle?

Heather
I usually enter in all of my information when my step son goes to afternoon preschool. Well, I entered my bbt and such and it changed my cycle to 22 days, which means af should be here Saturday. I ovulated the 26-27 and we bd 5 days in a row. If glow is right, I'm only 4 days away. Has this happened to anyone else?