I had nerve pain about 3 months after covid, affecting face and legs. It lasted several weeks, long enough to consult a neurologist, who was unable to help. This was early 2020 when we did not know a lot about neurological damage covid can cause. The nerve pain eventually went away on its own after a few months. I cannot comment on cymbalta. As far as long covid clinics - may depend on what there is in your area, or if you find a good one to travel to. I am also looking for a good post covid doctor or clinic to connect with. After 3 years of long covid I now have epilepsy.