i am not able to tell what might be going on particularly since you've had quite a few tests in the past. your condition is too complicated to figure out without the benefit of examining you. you need a doctor to examine you and i would be concerned particularly about the shortness of breath and pain/tightness. that is not something you should ignore. i assume when you had your heart checked it was because of these same types of symptoms. however they should still not be ignored and you should give your doctor a call.
causes of nausea tightness around mid-section shortness of breath sweating trembling and pain (not heart or anxiety). heart had been checked 1 year ago with all tests possible and everything perfect. electrocardiogram at emergency room showed no change. have gastroparesis and esophageal spasms but have not had an attack like this before. gall bladder removed 1 1/2 years ago. had slightly elevated white count (had sinus infection) and sligtly low potassium level. woke up in the night with nausea and went downhill from there. a lot of pain and trouble breathing with sweating and trembling hands.