You haven't had any tests yet or a conversation with your Primary care doc, so until you do I think you are getting ahead of yourself. I am also no sure why your TMS doc is speculating you have long covid? Especially since that almost means nothing in tha long covid is not a defined disease in which they have a treatment for but a classification for a chronic condition that has a wide range of symptoms which from people I know and have read about receive treatment almost as varied. I would pursue a doctor who has other patients who have "long covid" / chronic symptoms and has an interest in pursuing your situation proportionate to your need for relief. Hopefully it is your current primary doc....