I have fibromyalgia and now am 4 weeks post Covid. I had been fully vaccinated and boosted and never had a problem until now. Since getting Covid, my fibromyalgia symptoms of neuromuscular pain and extreme fatigue and weakness have gone through the roof. Searching for information on Covid worsening fibromyalgia, I came across this article. Am going to increase my Duloxitine from 20 to 30 mgs daily. Take Tylenol arthritis during day and Tylenol PM at night but it’s not very helpful.
https://connect.mayoclinic.org/discussion/experiencing-severe-long-haul-covid-joint-muscle-pain-fibromyalgia/