Breast pump

Brooke • 7 years ttc . diagnosed with pcos. 7 rounds of Clomid. 1 baby boy. 1 year later. Pregnant again. No help needed. Blessed beyond words..
I heard some insurance covers them. I have blue cross blue shield. Has anyone got bcbs to cover one? How do I go about getting one? (talk to dr, or call insurance?) how far in advance should I get started in the process of getting one? I am a second time mom, but this is my first time really trying to bf. Any help or advice would be greatly appreciated.