You'll have to add your blood test results and the reference ranges to your post. If the doctor told you the results are "normal" that doesn't mean anything much. We need to see the numbers.
High (over range) thyroglobulin antibodies means you have autoimmune thyroid disease (Hashimoto's). There is no cure for Hashimoto's which causes 90% of hypothyroidism but supplementing 100-200mcg selenium may delay progression. Levothyroxine treatment is for the low thyroid levels Hashimoro's eventually causes. Many people have found that 100% gluten-free diet is helpful in reducing Hashi flares, symptoms and eventually antibodies.
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