 [ Symptoms ] i am a 28 year old with chronic pain cognitive changes such as severe memory issues painful sensitive skin  everyone is stumped  very scared [ Disease ] hi i understand your concern as you are very young and should not be having so many problems for sure from the symptoms you have mentioned it definitely seems to be a multi system disease that has affected almost all of your body systems and hormones majorly the central nervous system seems to be affected more even if all the tests are negative i surely feel there is something remaining that needs to be done to come to a diagnosis you just cant let it go that way try changing the doctor any other neurophysician or an endocrinologist will be helpful thanks