my son, 5mths old (was a premie born at 31wks) has labs results t4 3.38, free t4.80, abd tsh 3.94, he was placed on 25mg of sythorid for 15 days. while on the drug T48.56, fT4 1.33, TSH .04 and T3 112. Was off the drug for 1mth, his recent labs without drugs show T4 4.41, freeT4 .76, TSH 3.25 and T3 140. Dr does not know what to make of these results. What do you think???