In your diet you can include garlic, chickpeas(channa), nuts esp almond, cumin seeds(jeera), fennel seeds(saumph), all these are galactogogues and will increase the milk production.
Next Steps
First of all don't worry that your producing less milk, this stress alone is enough to decrease secretion. If her weight gain is adequate as per her pediatrician then it means your producing enough milk.
Health Tips
Just make sure you don't have retracted nipples and the technique used for feeding is fine.