Your ped is too busy! WT hell? This is important, get a new 1 who takes you seriously. If he wont make time for a child like this, you will be fighting the whole way to get tests etc. I would also recommend a homeopath for food intollerance testing and the rest.

Its great you have started to get you both help, (cause when shes better, you will feel better)
Your a good loving mum