Glow changing my chart?! Has anyone had this happen?!

I woke up this morning and put in my bbt and glow changed my chart and now it says my fertile window was later than before, that I ovulated 3 days ago and that my period is due Dec 4 instead of Nov 26 th. Has this happened to anyone else and was it wrong or right? I feel a little discouraged because if its correct then j missed my window by 2 days after ovulation and 5 days before ovulation. km hoping its wrong. Genius is aldo telling me to do a preggo test today despite the change in my chart, so maybe I should test anyway. What do you think?!