What could cause extreme anxiety symptoms and depressive feelings in a person with a medical history of thyroid imbalance and hyperthyroid?

Hello doctor,

I had thyroid imbalance and hyperthyroid (silent or subacute thyroiditis) two years ago and had really bad anxiety symptoms (dizziness, imbalance, rapid heartbeat, body stiffness, unable to concentrate, etc.) The thyroid indexes came back to normal after three months on its own however I did not recover fully from the symptoms. I am gradually getting better and symptoms are reducing in magnitude but I have not yet fully recovered. I have tightness or stiffness on the right side of my neck, shoulder, back, hips and high anxiety or depressive feelings, and at times palpitations. All thyroid indexes are normal. I am getting better at a slow pace over the last two years but still have not fully recovered. Please suggest what should I do to feel healthy again. I am currently on cholesterol medication and took a beta-blocker during the hyperthyroid phase.

Thank you.