Hi there, My DS is 20 days old (3 weeks tomoz) ...

Hi there, My DS is 20 days old (3 weeks tomoz) and for the first 17 days i had been demand feeding him until he was full (which ofetn results in the very 'groggy' look on his face). He was sleeping well and was very happy. Then the community nurse came for the first visit at home and weighed him. He had put on about 400g/ week for those two weeks (average apparantly was only 250-300g). He weighed 8 lbs 10 oz at birth and he is feeding every 2-4 hours. As a first time mum, i am just feeling a little clueless about the whole thing....and wondering if he isn't grumpy, do i keep feeding as he demands?!?!?! I hope that all makes sense...