I Have Beem Diagnosed With Hyperthyroidism And Am Medicating With

I have beem diagnosed with hyperthyroidism and am medicating with 7.5 mg of methimazole daily. The latest lab results indicated a TSH level of 6.040uIU/ml and was flagged as high, T4, Free(Direct) results was 1.09 ng/dL and was within reference range. I seem to be unusually thirsty and am concerned if there is another problem that needs to be addressed. Thank you for your help.
Conrad Smith