Do your T3 and T4 tests say they are FREE T3 (FT3) and FREE T4 (FT4)? If FREE isn't specified in the description, they are total T3 and total T4.
Both TGab and TPOab are elevated. Those are the two markers for Hashimoto's thyroiditis (Hashi's). Hashi's is an autoimmune disease. Your immune system sees your thyroid as foreign protein and attacks it. Hashi's is the most prevalent cause of hypothyroidism.
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