Confused with BBT

Amber-Rose • Twenty-four. Married; Momma of a little girl, 12/01/2015 and Baby boy born 08/03/2017.
This is my second month charting and my chart looks way different and I had a .40 dip before a twenty or something rise, does that sound normal? I've been kind of in a slump this month and have only been charting because of being discouraged about not ovulating. So what do you think? Am I just getting my hopes up again this month?