My best wishes to each and every one of you and all you have long COVID. It is real. It exists whether a particular MD treats it seriously or not. You know it is true and I know it, as well. I am the parent of a daughter who had CFS (chronic fatigue syndrome), which is now included with long-COVID in the same group of post-viral infection syndromes. Believe in yourself, I hope you have someone else who also believes you and can help with travel to appointments. Start locally and if you don't get taken seriously there, go to the next larger city, and finally go to the largest clinic you can find, or if you are near that large clinic, go there immediately. Look for a sympathetic, understanding medical professional. Unfortunately, there is no "cure" for long-COVID or for any of the post-viral infection syndromes. But there are measures and supplements that can help. My daughter ended up seeing a psychiatrist-neurologist who was interested in Chronic Fatigue Syndrome. She still goes there even though she is has been over it for about 17 years. My heart goes out to each and every one of you because the medical profession does not, to a person, take it seriously. It is very serious to each and every one of you and you deserve excellent, understanding, caring treatment. Good luck.