C.l.i.a method. t3-83ng/dl,t4-8.3ug/dl,tsh-8.07uiu/ml. t3&t4 are normal but tsh level elevated.is it thyroid? shall i take medicine or natural diet?

Elevated TSH: The elevated TSH suggests your thyroid is in the process of failing, probably from Hashimotos thyroiditis, which is autoimmune. If you feel well, you need not take anything now, but your thyroid will likely fail, and you will need to take levothyroxine. This could happen in 3 months or could take years. Many doctors would start meds now. Diet/herbs/iodine/vitamins will not help.