>>/923168/
A person can have many things wrong. Since you are fat, you're gonna have things wrong, some of which might be unrelated. Although fixing things wouldn't be bad.
I know doctors are also clueless and could send you to various specialist, but might be better to follow their "line of investigation". They might have a better guess for a starting point. Even if it's not a private doc, but the regular home physician.
A NEET above suggested that some of your symptoms (not necessarily with this taste problem) could be psychosomatic too. What we could read on this board from you, without a professional training we can tell you have problems.