pumping before baby is born?

Stephanie C • Mommy x2 👦🏻👶🏻💙 Married to my best friend.
I had a hard time breast feeding my first born because I didn't produce enough milk, had to stop when he was about 3 weeks old. I am determined to breast feed my 2nd but I'm scared the same thing will happen. I heard it helps if you start pumping a week before the baby comes, is that true? If not any other tips? Thanks 🙃