 [ Symptoms ] i have started suffering burning muscle pain and achy joint pain i have been fatigued experienced brain fog [ Disease ] it kinda sounds like you might have a pinched nerve and you may be getting the brain fog from and stomach pain from stressanxiety…are you under a lot of pressure because of something from school or work are you on any medications if so what are you taking have you been sleeping enough are you eatingdrinking water regularly and please do not take offense to this next question…but have you ever done any sort of drugs sorry about all of the questions but i would have a more accurate answer for you if i had more information