Breastmilk Help.

Candice
When my son was in the Nicu (22 days) I use to get about 4oz Each Boob Every 3 Hours .. It's like all of a sudden since he's been home when I do pump I'm barely getting 1oz from both boobs 😩is there anything I can do to get my milk back ? Any Tips ? Anythingggg? I really don't want to give him formula ..