Need help with bbt

Angela • 34 years old. I have one amazing little boy who we prayed and waited for 4 years for! He is an IVF baby! We are so blessed to be expecting our 2nd boy. He’s our little surprise!
I've been ttc for 9 months for my first. Just recently started taking my bbt. What is this supposed to tell me? I've done my research but still a little confused!