Background: I am 42yr old female, having kidney issue but my creatinine ia always maintained at 1.5 and and taking BP medicine stamlo 2.5mg twice a day. I have been taking Thyronorm 75mg from last 5 yrs for thyroid treatment, recently I have done thyroid profile test where as my T4 value is 0.713 below the normal range but where as my TSH is at 2.2 and T3 is 8.67 My question is as my T4 level is low, do I need to change thyronorm dosage after consulting doctor ? Now a days I am experiencing fast pulse rate up to 127, not sure if it is bcos of my recent covid infection or anything to.do with my thyroid issue. Please suggest.