I have had bouts of diarrhea for 2 days with on and off nausea. could this be a heart attack? no one around me has been sick. no other issues. bp normal range. had nuclear stress test done 5 years ago and it came back normal after "abnormal" ekg?

Your symptoms point towards a gastrointestinal issue. Consider getting evaluated by your doctor in person to confirm the diagnosis.

The combination of nausea and diarrhea is most often caused by a viral gastrointestinal tract infection or a bout of mild food poisoning. Both resolve on their own. Rest,drink adequate room temperature fluids including flat ginger ale, eat a soft,bland diet and take kaopectate or imodium if too many movements occur. See your MD.if not gradually improving for exam & stool culture. Not cardiac issue