It is so bizarre.So at the very beginning I could not swallow at all.The specialists were trying antibiotics,antiparasite,antifungal and nothing was working.The GI Doctors could not figure it out and said this has to be viral and it is your muscles.Thankfully my primary gave me steroids which gave me the ability to eat again because I had lost so much weight.Have you lost strength in the trunk of your body as well?It is like ALS/Muscular Dystrophy and Myasthenia Gravis all in one.Have you tried steroids?That might help your vocal chord.I could barely talk when I was having the swallowing issues.Also have you been tested for Myasthenia Gravis?Covid can bring on Myasthenia Gravis which is similar to ALS.There is also a disease called LEMS.I thought I had Lupus because so many people in my Family have it,but the Rhuematologists told me no.You should also look up the vagus nerve when you get time.I could not sneeze,cough or yawn for a year and now it is slowly coming back.I think covid brings on Autoimmune and neurological type symptoms,but it hides from the conventional tests.I would Love to try Mestinon,but the neurologists will not let me try it out.They don't know enough about long covid to know what could help or possibly work.