You may find some good material to give your doctor at Resources for Doctors
Also at Finding a Doctor
NICE (National Institutue for Health Care and Excellence) UK Myalgic encephalomyelitis (or encephalopathy)/chronic fatigue syndrome: diagnosis and management
Advanced Medical Testing
“A single-photon emission computerized tomography (SPECT) scan lets your doctor analyze your body’s organs, tissue and bones. A SPECT scan is a type of nuclear imaging test, which means it uses a radioactive substance and a special camera to create 3D pictures,”
Clinics and Doctors That Help Get the Diagnosis
The Workwell Foundation
Diagnostic Criteria
https://www.omfcanada.ngo/diagnosis-of-me-cfs/
Diagnosing ME/CFS by Dr. Lucinda Bateman and Dr. Susan Levine
Miscellaneous
Overview
Solve ME’s ME/CFS Disease Criteria and Terminology: Research, Inclusion and Community
Scales of Functioning
Symptoms
https://www.verywellhealth.com/chronic-fatigue-syndrome-symptoms-716110
Dr. Charles Lapp on the Four Main Symptoms of ME/CFS “There are at least four core symptoms in ME/CFS: pain, cognitive dysfunction, fatigue or post-exertional malaise, and non-restorative sleep. Thus, awakening unrefreshed is one of the cardinal symptoms of ME/CFS, and one of the last symptoms to resolve as one improves.”
Testing
Chronic Fatigue Syndrome A Roadmap for Testing and Treatment