Hypothyroidism

15 y , old girl ,weight 36 kg , tsh is now 61.43, t4 8.10, t3 0.66 , now thyronorm 75 MCG running , HB 10.7 , eosinophils 08 , monocytes 03 , sgot 42 iu/l ,alkaline phosphate 410 iu/L, serum potassium 3.46 mmol/L, serum globulin 2.07 g/DL , a/g ratio 2.16 , serum calcium 8.39 mg/DL , I take this case , what the suitable dosage of thyronorm for this girl , now the girl heavy bleeding in period