My advice? Ignore your peditrician(doctors get very little if any instruction on BFing). Do not supplement. Newborns are supposed to nurse all the time. Seriously, they have a growthspurt at 2-3 weeks of age and the only way she can boost your supply is to nurse, nurse, nurse. Supplementing will only increase the chance of having supply issues and is the sure fire way of ending a nursing relationship. Newborns stomaches are the size of walnuts and BM is disgested quickly. There is nothing wrong with your milk or your baby if all she wants to do is nurse.
As long as she is having her poopy/wet diapers then she is right on track. It is not uncommon nor does it signify anything wrong with your baby or your milk if she is being 100% BF and is not at her birth weight at 2 weeks. From my experience(with my boys) and from other friends that many, many BF babies are not at their birthweight until 3 weeks.
Hang in there, it takes until 5-6 weeks to full establish your milk supply and get somewhat of a routine down so that you don't feel like such a milk machine 24/7. Until you hit that mark, you are a milk machine.

You are doing GREAT, don't give up!!!!!!