First time momma here

Hey ladies. I’m a first time momma here and I need help trying to get more milk out of my breast.

My doctor told me it would probably be a little late due to the fact that I lost way to much blood on the day my son was born.

He did latch on right after birth but Because of all my blood lose I was practically fainting in and out for the first two days of his life. But I still tried to feed from my breast (other times he got bottle/formula). I still pump and sometimes I get enough to make 2-3 ounces. And other times I don’t even get close to making an ounce. I was wondering if anyone know anything I can do to try and help myself produce more? Or if any other mommies have experience this?! I am still taking my vitamins. Thanks ladies!