Treated for thyroidits (hashi's ruled out) w/ 75mcg levo/10mcg cytomel (liothyronine) but experiencing panic attacks nausea, trouble breathing, hot flashes nightime?

Mood and hormones. Hypo or hyper thyroid states may serious impact not only the body but the brain...mind. 1% of the chronic patients in state mental hospitals are cured and released each year, when their thyroid status is corrected. See your family medical doctor or endocrinologist soon.
Too much. You sound like you're on too much thyroid replacement. Cytomel (liothyronine) is not generally needed with levothyroxine. I suggest you get a second opinion from a card-carrying endocrinologist!