Noted the history and understood your concerns as there is no diagnosis yet in spite of 4 attacks of feeling sick to stomach, diarrhea
, skin turning into bright red and passing out twice and seen the Doctors.
Blood tests must have been done routine hence not found anything.
As per the history I would advise you the following:Consult a Gastroenterologist
You need a detailed blood work including the tests for a condition called Carcinoid tumor
into which one gets similar symptoms.
Also needed is Contrast enhanced CT scan of abdomen.Colonoscopy
Blood tests for tumor markers.
Tests of stool for three consecutive days.
All these will lead to a proper diagnosis and thus get treated as per the findings.
If this turns to be a Carcinoid syndrome then you may need a surgery and chemotherapy
under the guidance of Cancer Specialist.
Hope I have answered your query. Let me know if I can assist you further.
Dr. T Chandrakant,