Long covid rare symptoms

Hi, I'm new, so bear with me.
I tested positive for covid in 2020. Very atypical symptoms. No fever,
no cold or sore throat. I became very tired on my 10th day and i developed this incredible burning sensation in my mouth and up my nose. The skin on the outside of my nose and around my mouth was on fire! I have had three shots and developed severe muscle and joint pain that I didn't have with the active virus. That took about a year to finally go away. Since then, I went through "everything always smells like burnt onions, " to the rancid smell stage, and for the last 4 years, intermittent nasal, mouth and skin burning.
It will reappear without warning, stay for a few days or a few weeks. And it's always worse at night. I can't find any information about this "condition" anywhere. My husband is a pcp, and one of his partners referred me to an ENT. I've seen her twice and she has not heard of my particular post civic issues. I am beyond frustrated. Right now I'm taking Centrum silver power her recommendation. Can anyone relate??? Thank you!