Regarding ovulation day. HELP!

Hi ladies, this is my first month of trying this app. Been trying to conceive for around 10months but no luck yet. And I recently found out that I have PCOS on both ovaries.

Please educate me. I have around 35days cycle (sometimes 30, sometimes 37) and it says on the app that tomorrow is my ovulation day. But it shows on my chart that my bbt spiked and it’s consistently high. So do I follow the bbt chart? And this means I ovulated on the 16th day?

Thank you in advance for your help🙏🏻