My son is 5 weeks old and eats about 5 oz per feeding every 2 hours. I have wanted to breast feed him exclusively but have been unable to do so because at his 2 week checkup he had not gained enough weight back. He also hadn't gained enough weight by 3 weeks of age. His doctor told me to pump and feed him what I pump and then to offer him formula. So for the past 3 weeks he has been breast feeding and then getting formula. I have only been able to pump 2 oz, so I know he eats about 2 oz from me and now, at 5 weeks he has been also eating 3 oz of formula. The problem is that it takes SO long to feed him that he is hungry again shortly after he is done feeding the first time. I need some suggestions on how to build up my milk supply. I really want to breast feed only and would LOVE to be able to stop using formula. I really need some advice on how to produce more milk.