I have very difficulty to produce breast milk. I produce only 4 oz a day. Almost give up, can anyone give me advice on how to increase quantity?

jgn stress nt susu tk nk keluar, mnm air suam yg byk 2-3liter sehari , buah kurma also good...sy mnm coco munif hijjaz :-) they have arabic gam.. membantu...in sha Allah