I sound very much like you. Got Covid Dec 22, just after finishing radiation for breast cancer. Had 3 shots prior to getting the virus. Took Paxlovid, had rebound and it came back worse than before. Soon after I started with anxiety and horrible insomnia. Fibromyalgia type all over body pain set in. Stomach, gerd, Sjogren type symptoms of dry mucus membranes. I suffer greatly and the pain never lessens. Been tested for everything and on top of all of this I have a severe balance issue. Walk with a cane and had to retire. Prior to this very active and healthy all my life. I was blessed. Living this way is just existing and husband is losing his patience. Brain fog and neuropathy also very severe. All of this has lead to depression and anxiety.