When your T3 , T4 are normal andTSH level is around 9 it's known as subclinical hypothyroidism
There will be no symptoms exept for elevated
TSH
In such conditions no medicine is required keep watching the TSH every 6 months.Why you had to repeat 4 times in a month?
Next Steps
If you are planning for pregnancy you need to initiate treatment after consulting with your doctor and
thyroid antibody test is indicated as well