My son is 4 months old, and when I pump, I don't make the amount he usually drinks. I try to nurse whenever I can. The only time I don't nurse is when I work. When I pump at work, I'm not making enough to keep up with his bottles. I know when I feed him he is getting enough because he is still gaining weight without a supplement. How do I produce more when I pump to keep up with when he takes a bottle?
Milk supply is all about supply and demand. The more you request your body to make milk, the more it will make. You can try adding pumping sessions after a couple of you feeding sessions at the breast. This will give you more milk to leave with your care provider while you are at work, and it will completely empty your breasts signaling your body to increase production.
All the best,