low weight and height

[pmiller75]

My son just turned 2 years old.  He is 22 lbs and 32in.  Last year at this time we started noticing him losing weight.  He was having chronic diarrhea and was not growing.  He was tested for celiac disease which came back normal.  We were then referred to a pediatric endocrinologist who tested him for growth hormone defiency.  That test came back normal but he did mention he wanted to test him for IGF-1 levels.  In the mean time our pediatrician tested him for food allergies.  He was severely allergic to wheat, peanuts and eggs.  Once we changed his diet the diarrhea stopped and he started to gain some weight so that's where we stopped.  Now a year later we seem to be back where we started.  He is having diarrhea again and losing weight.  He only wears 12 months clothing which falls off of him.  Our doctor went ahead with the IGF-1 test which we are waiting on.  He also had an upper GI done because he is not wanting to eat to make sure he did not have a blockage.  Everything looked normal.  He has another appt. with a endocrinologist in April.  We feel as though no one is taking this seriously.  Our child is obviously sick and not growing.  Any suggestions as to what could be going on that we are missing?  

Thanks,
Piper Miller