@laja,
Wow, can I relate - we are like twins in our symptoms! My rib cage and stomach feels like I'm being squeezed by a Cobra snake. I've been suffering with same symptoms now for 3 yrs!

In addition to the above, I developed a chalazion below my lower lash line and phetheris and I never had issues with my eyes. The chalazion became infected after Dr did a steriod shot. That resulted in two surgeries to lance it and get the pus out, all to no avail and chalazion is still there 1 yr later. Just recently my throat started to hurt, went to walk-in clinic fearing Covid or strep, again which luckily tested negative. 1 week ago, I now have a sore red area in back of my throat with a white/creamy colored spot in center, hurts to swallow. I'm thinking possibly EBV, etc.
Again, never had any of these issues prior. Also now developed a groin hernia which requires surgery I can't get because my weight is now down to 90 lbs.

Blood work now shows low B-12, ferritin and zinc - hello Covid! I was told I need a B-12 injection and iron infusion. Infusion was worst mistake every! I had such a severe reaction and my feet turned bright red/blue-ish in color and were very painful with pins & needles senstions. It was the worst experience every. They had to give me strong antihistamine. Worst yet, they want me to come back and continue with the infusions!

As an FYI, save yourself some $$$. I did the same and tested for mold toxicity and it tested fine. If anything, I would focus on the gut for fungus, etc. My stomach is in so much pain and I can no longer even it the foods I always ate and loved. I had an endoscopy due to the extreme weight loss and it showed mild inflammation in lining of stomach. Never had this pre-covid and I know I wouldn't have it now if I never got Covid, twice.

Like you, I was so very health and active and enjoyed running, walking, hiking, yoga, working in my yard and lovin' my job so much. I can barely function and survive now.

I'm going to send you PM - please watch for it.
Your right, Covid messed with our very healthy immune system and is attacking our body in ways we can't imagine.