Ovulation blood work/ CM

Madalyn • Married 9/20/14. TTC since 10/2014. Firefighter`s wife <3 ABA/ Autism Therapist :)

I'm supposed to go this week (CD 21) for blood work to see if I'm ovulating on my own. Yesterday my CM was almost egg white but today it back to sticky... I've been on Metformin since 10/08 I was SO hoping this would be our month, but now I'm terrified that I'm not ovulating on my own.

Anyone with experience in this area?