To determine if there is any evidence on the efficacy/effectiveness of Guanfacine, micronized PEA (palmitoylethanolamide) and/or amygdala and insula retraining programs in treating patients diagnosed with long COVID. Additionally, to determine if there is any evidence on the efficacy/effectiveness of amygdala and insula retraining program in treating patients diagnosed with myalgic encephalomyelitis/chronic fatigue syndrome.