my 6 weeks baby is not wake for milk after 4 hours also ..is this problem ..if I wake him up he is sleepy and not drinking milk ..

A. It's quite normal in newborns .That's how they function. It's not a concern. After few months they will start to follow a sleep routine. Follow a sleep pattern ensure to put your baby to sleep at the same time every day. Feed a little more during night hours for good sleep. Make sure to feed on demand