Not even 1 month my milk supply running low

Hey everyone I am pretty bummed out now that I’m only less than a month now and my breastmilk is low. I tried pumping 10mins on each side and 10mins rest and repeat the cycle but i only get 40ml from both breasts for 3 days straight. Any advice i could get to help increase my milk supply? And anyone experience low supply at first but manage to increase it? Thanks in advance