Anyone taken a blood test to confirm ovulation?

Alexandria • Wife 7/3/11💍 Mommy to be 2/9/19🤰🏻

My doctor doesn't believe me when I say I don't think I ovulate. I have been tracking my temps and cm and opks. I get lots of positive opks but my temps are Rocky Mountains. Also no egg white cm. He says if I have a regular cycle then I'm ovulating. I have an order form to have a blood test in two weeks to confirm ovulation. He gave me no information on exactly when I'm supposed to take blood. If you have done this can you please tell me when I'm supposed to go for my blood panel?

P.s I have been diagnosed with pcos and have been on metformin for a year now. Thinking of changing doctors.