get another doctor's opinion...please do not wait
I am a volunteer and a mom of a type one diabetic. I would suggest that if your son a has several of the symptoms below have him tested again for diabetes. If your doctor refuses go to another pediatrician. This is your daughter health. If the doctor cannot figure it out me would suggest getting a second opinion.
Knowing the warning signs for type 1 diabetes (juvenile diabetes) could save a child's life.
Warning signs of type 1 diabetes (these may occur suddenly):
Extreme thirst
Frequent urination
Sudden vision changes
Sugar in urine
Fruity, sweet, or wine-like odor on breath
Increased appetite
Sudden weight loss
Drowsiness, lethargy
Heavy, labored breathing
Stupor, unconsciousness
If your child exhibits one or more of these symptoms, call a doctor immediately