I'm sorry to hear about your struggles and hope that as research continues there will be some answers for all of us! You're not alone, so many dealing with varying issues and timelines. I've seen ENT and Cardiologist with Normal results and no explanation of the root cause of my dizziness. PT was the most helpful in improving symptoms, but I'm out of covered visits and still not back to my pre-covid normal after 5 months. My primary doctor is supportive but not sure how to help mostly, and in the meantime we're trying to treat anything we CAN identify and hope it makes some difference overall. I've seen some progress and try to remind myself to be thankful for anything, but it's not always easy to stay positive. Hang in there.