Breastfeeding help

Trista

So, i had my baby March 27th she weighed 5lb 10oz at birth, we left the hospital and she weighed 5lb 4oz! We went to our first ped. Apt and she weighed 5lb 2oz, then they were concerned about her not getting enough milk, so we would come back for a weight check Thursday today! She weighed 5lb 1oz. Now they want me to exclusively pump until Monday april 8th and I have to log all wet, poopy, when she eats and how many oz a day until Monday. I dont want to pump at all, i would like to keep breastfeeding. She has plenty of wet and poopy diapers, shes happy and alert during the day! Anyone have tips or have been in my position!? Thanks ladies

Edit, when we went to my ped apts, we saw a nurse practitioner, and today Thursday we saw a nurse i still have not been seen by a doc for my newborn, should we go elsewhere for another ped?