Had she done a poo prior to (but close to) getting weighed? This can make a big difference in the weight as well.

I think if your doctor was that worried, they should be able to get you a paed. appt earlier than that (although within a months is a lot earlier than I would get one). If you are really worried maybe its worth pressing the issue?

My paed booked someone in within 2 days after talking to her on the phone - I was paying my account at the time, and she just came out and told her receptionist to make room for this patient.