Change in predictions

Sa

Hey is it normal for glow to al of a sudden change my prediction? Until this morning I was going to have AF in 3 days know it is in 11 days?? And my ovulation should be today. This is my temp chart. I was hoping that the elevation of yesterday was the implantation. In the former preditions my ovulation was on the 18th September.

What does this mean? I was getting ready to test for pregnancy.