Sir, i have hypothyroid from last 12 years,i take tyronorm50mcg daily.recently i tool vitamin d3 test and it shows levels abnormally low.25 ohvitamin d3 RIA 9.17ng/ml.my age is 43.height 171cm,weight 87kg.t3-82,t4-7.3,tsh-4.96 onCLIA.suggest what should be my line of treatment/further investigation