I have been diagnosed with Fibromyalgia/ME / CFS for almost two years now. Symptoms started in 2009/2010 and have been getting progressively worse since, affecting all aspects of life, especially socially and professional as the symptoms are debilitating (wide spread pain) on a daily basis since late 2010. General exhaustion (day to day) started in late 2016 without any over-exertion, and severe daily brain fog started in early 2017 along with severe exhaustion (minute by minute exhaustion) by doing basic daily tasks (e.g. showering, brushing teeth, walking up and down stairs, talking for a few mins), none of which I had any problems with before. My primary doctors said there isn’t a specific diagnostic test for it, he diagnosed me based on a questionnaire and recommended CBT (which I did). What medical/imaging tests can be done to prove something is wrong, and maybe trend recovery/decline ? Much thanks.