How to make my milk better?

Dina

Hi! So my problem is that I produce a pretty good amount of milk, but it is not very nutricous. It was really watery with my two girls and they would never get full. Do any of you ladies have advice on how to make my milk better? I am 22 weeks pregnant with baby #3 and would really like to be able to breastfeed him. My problem is more the quality not the quantity.