I felt all alone before I read about your l lichen planis autoimmun disease. I also had covid march of 2020 and I have all the symptoms you have. Mine started in my mouth. My dermatologist and oncologist refer mine as oral lichen planis. I also have a low blood count so my immune system is in bad shape. Like you, doctors say no cure and treat symptoms. I have nothing to add except additional symptoms like loss of appetite, tender spots on my head, and (v) itching. I thank you for sharing........I am near tears.. Hope to see you here again.