Firstly how much high is the
tsh , please tell the exact value .
Also we need to see that if you are having any symptoms like excessive sleepiness , neck swelling , hair loss , weight gain , loss of appetite .. etc
Get Anti- Tg antibodies
Also repeat Freet3Freet4 test
Get ultrasound of neck .
What you are having could be subclinical hupothyroididsm, for which you do need medication .