Peak day changed?

Has anyone else had this happen? My peak day was supposed to be yesterday, woke up this morning and took my temp. Then glow changed my peak day to three days earlier. It was 97.7 for three days, and 97.9 today. I'm a little worried about not ovulating. Cm doesn't change for the most part. ..goes from dry to watery and i've never noticed an egg white stage.