Dealing with Multiple Health Issues: How to Manage?

I recently have developed callus patches on the sides of my fingers which is causing continual pain. I have random patches everywhere on my body. I came down with Delta COVID used Mycrobial antibodies which worked. I since have long COVID: shortness of breath, fatique, body rashes, I broke out with by my third case of Shingles too! That’s not it: I have Fibromyalgia , irritable Bowel Syndrome, Diverticulosis, Degenerative Disc dease. How can I manage the rashes and the RA & Psoreatic Arthritis???