Chart Help!

Jill • Married • 35 • PCOS Daughter born 23/09/2015 Daughter born 27/03/2019

I am so confused... I have had a drop in my temp but am still above cover line. I am a couple days late with my period but still getting negative tests. Should I assume this drop is a sign my period is on the way? I want to be hopeful but not unrealistic. Thanks for any insight!