Fertile days switched?

Ashley • Married August 23, 2013, Mommy to Hudson, Layne & Lenyn
Has this happened to anyone? I just opened the app again this morning and I should be on my tww, but glow changed my days and says I have a 22% chance of pregnancy today? So confused and frustrated I hope I did not miss my fertile window! Why did it change when I did not make any changes to the app?