Drinks/ food to increase milk supply?

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Edit: Thank you everyone with all the advice and information given. Ive been so out of it i forgot how to do my own research on how to take care of the issues at hand. I really appreciate it from the bottom of my heart. Signed a very tired mama x4 :) -

What is a food or drink that has help you uo your milk supply? Due to baby high level of bilirubin my the pediatrician wants me to do formula and because of this im scared to my milk will drop. I do pump everytime i feed him tho it varies... before that i was making about 4oz total each session. I am 1 week and a half postpartum.