Hi. I have heard about people who have had covid end up with some kind of tinnitus. Not sure if you've heard of this, but since medical doctors who can't seem to do something about this, they shrug off the condition with the usual, 'oh it just tinnitus '. I am suggesting you try an Accupuntrist. Some chiropractors include this in their practice but you can find one who is independent of them. Depending on where you live, Google Accupunctrist in your area. Find out if they've experienced patients with a similar problem. Good luck. I hope you find relief soon.