Another feeding question. My baby is 20 days old....?

it takes a few weeks for your to adjust to making the right amount of milk for your baby, they learn how much they need to produce by how much your baby feeds, as it has only been 20 days, its possible your baby is genuinely hungry, or if he is pukey, he may be losing fluid and feeling thirsty. it takes a few weeks to get into a good routine. good luck and keep trying, it will get easier and better. x