Help reading BBT chart!

Danielle
Hi! This is my first month Charting. I just came off of birth control pills in September, so not sure if my body is still trying to get back on track, but my chart is crazy looking. My cycles are usually between 35 and 40 days. The rise in temps, and missed bbt charting before the designated "fertile window" (cd14-17) were due to me coming down with the flu. Anyone have any idea where my cover line is going to be? Or why I've had a steady decline for the few days around when I should have been ovulating? (Screenshot is from yesterday but just took temp this morning and it was 97.1)