Your little one was probably crying so hard when his glucose levels were low because he felt bad... when
glucose levels drop below about 70, we feel pretty awful. The
high reading over 200 certainly is way above where the normal level should be, so I agree that he should be checked by a pediatrician. Even if tests come back normal, I would recommend that he be tested often after this, for many type 1 diabetics start out with hypoglycemic episodes before full-fledged diabetes strikes.