Mothers Milk?!?

I had my daughter 3/17 she was 2 months early she is in NICU I've been pumping and bringing milk they keep going up on her milk intake  (WHICH IS ABSOLUTELY GREAT) but I can't keep up. They told me to try Mothers Milk it's an herbal tea. Has anyone tried it before? How was it? What are some other things I can do to produce more milk? I'm pumping milk every 2-3hrs drinking plenty of water and getting sleep! I absolutely do not want her to have Similac!!! I feel like a terribly bad mother 😒😒😒😒😒😒😒😒😒 #HELP