no problem la, demand based on request, when your baby eats more, you will produce more
I am a poor mom (low production) and I used to supplement formula milk to my baby before she gets 7 mths old, after that when she started eating solid food, I don't need formula milk anymore, as I am a full time mom, I breastfeed her directly regardless how much milk I can supply, so far it is very ok
add oil and you should be ok, try to feed her more directly