Sleeping and Eating too much?

I don't know what to think; tomorrow we'll go to the pediatric
and ask. Our Andreas seems to really be eating and sleeping
a lot for his age. He has been eating about 200 ml of
expressed breastmilk every 4 or 5 hours a day. For a 1 week
old, who is supposed to have a *small* stomach, this seems
a bit too much. We'll see what the doctor says tomorrow
and how much weight he has been gaining.