feel like I don't feed my almost 3 week old son enough. I gave him a six ounce formula bottle and he…

feel like I don't feed my almost 3 week old son enough. I gave him a six ounce formula bottle and he just always seems hungry., normally drink like half of it. and hungry like I sware and hour later. and he tries to latch like crazy and screams when I take bottle away. is this clusterfeeding like he always hungry..