Yes! I posted this, but still have not been able to try Mestinon. I do think what most of us have is Autoimmune or Neuroautoimmune brought on from Covid. The vagus nerve is very involved though because covid directly attacks it. Someone was saying that covid completely depletes the brain of seritonin which needs to be there in order for the vagus nerve to function properly. I have been dealing with this for three years as well. The damage that Covid causes is almost like a Traumatic Brain Injury/concussion. I could barely do anything the first year including feed myself.I was an athlete running 10 miles a day before covid got me. I have noticed so many people that ended up with long covid were athletes/go getters.We just never stopped.I have been tested for MS, Myasthenia Gravis, Muscular Dystrophy, all Autoimmune Diseases, ALS, etc. I have alot of symptoms that mimic NeuroSjogrens, but even with several positive ANA's and a high speckled pattern the Rhuematologists say it is not Autoimmune. I think that it is Autoimmune, but because Covid brought it on it is not presenting like it should with the testing.