Hi..I Am 27 Years Old. I Have Got My T3/T4/TSH

Hi..I am 27 years old. I have got my T3/T4/TSH tests done. T3 is 0.98 ng/mL, T4 is 7.99 mcg/dL and TSH is 6.75 mcIU/mL . T3 and T4 seems normal. But TSH is not between 0.4 - 4.2 which is normal in adults. Currently I am taking 50 mcg thyronorm tab. Can you please tell me whether I have to continue with that only or i have to change my dosage