If all you do for your Hashimoto’s thyroiditis is take thyroid hormone replacement, you need to know that everything is not fine. Hashimoto's is an alarm that your body is under attack - and a prescription is not the answer.
Hashimoto's thyroiditis, like other autoimmune diseases, results from your immune system attacking you. In the case of Hashimoto's, the thyroid gland is the target of your "misguided" immune system. This attack can spread to other tissues, including the brain. Ignore it at your own peril.