I can’t say whether or not a TT would ease anxiety or reduce panic attacks. I experienced more anxiety/depression AFTER my surgery but I suspect that is due to anxiety I had surrounding the surgery and the resulting hypothyroidism (I may eventually talk about this elsewhere on this forum). I was on medications for years and then had ablation. They had a tough time controlling my levels after ablation. In the course of my disease, I would only feel anxiety/angst when my levels were elevated; so much so, that I could recognize when my symptoms were associated with elevated thyroid hormones. I might suggest keeping a journal about what events and thoughts are occurring during the time are you struggling with anxiety and then compare them to your lab work to see if there are any consistencies. It may be a combination of thoughts, events, and elevated thyroid hormones.
