why has everything changed?

carly

I am new to all this- TTC, Charting, BBT... all of it!

Initially Glow told me my fertile window was 8th-15th Jan with my peak chances being on 11th. I have been taking my BBT every morning and yesterday Glow told me my next AF is due in 7 days....

This morning my fertile window has changed and now it says my next AF is due in 11 days!

I am so confused!

Help?