Welcome to HCM
We understnd your concerns
I went through your descriptions and am sincerely sure that almost all the symptoms you are mentioning are, in actulity doesnot exist at all. Don't take me wrong. You had so many tests done and visited so many doctors. None of them could find any trouble with you. And you feel they are all WRONG. How can one justify this. One or two doctors can be wrong. But not everyone.
Please understand. You need to believe your doctor because god cannot come and say that 'You are normal'. Secondly to doubt your medical well being you are not a doctor.
I am being harsh on using my language because such language should clear your doubts. You must be having Hypochondriasis
. A Psychological (not Psychiatric) disorder which compels a person to lament self about diseases which he doestnot have at all. Always doubts that he has one or other chronic diseases and feels helpless but always complaining.
You should see a psychologist
/ psychotherapist soon for further assistance.
Hope I am able to clear your doubt. Available for further queries.