Autoimmune diagnosis issues -Hashimotos Thyroiditis with normal TSH?

Hi,
I have been getting different diagnosis and instructions with meds/vitamins with no resolution. It started over 1.5 years ago, with extreme fatigue, weight gain, nausea, headaches, lack of energy, and brain fog. First they claimed it was all from Covid and anxiety. Then I was told maybe it’s hormonal.
After multiple tests and physicians, they said all they can find is Hashimotos Thyroiditis, which they do not treat until I have an abnormal TSH. My antibodies are extremely high, but that’s all they can find. I don’t know what else to do. Any suggestions? Thanks.