What’s the one thing you swear helped increase your milk supply!!? -Signed, a struggling under producer

I’ve tried oatmeal, body armor drink, coconut water and so far still just averaging 1 oz per pump session.

I pump every 2-4 hr, I power pump 2x daily, skin to skin, drinking lots of water, lactation nurse measured me at 19mm flanges,. Nothing seems to increase my production.

I’m 18 days PP, FTM,