Welcome to HCM
We understand your concerns
I went through your description. I suggest you not to worry too much. You had been to so many doctors and so many tests and everything came back normal. Now why are you thinking about lupus? If it was the case, doctors would have told you so.
Worrying about body and diseases and thinking about having a life threatening disease (whereas medical science could not identify any), is the symptom of Hypochondriasis
. It is mental disorder. Mind you not a mental disease.
Believe in your doctors. They know better than you. Concentrate on your life and career. Consult a psychologist
for further advice. I shall help you through healthcaremagic if you desire so.
Hope this clears your doubts. Available for further clarifications.
Good luck. Get well soon.