Welcome to HCM
We understand your concerns
The condition you are explaining might be very much common and happens to everyone. After heated discussion people feel thirsty or hungry or nauseated or tired etc. Some people feel urge to urinate or evacuation. These happens due to some internal hormonal
changes. You must have noticed excess gastric juice flow and burping of gasing after such arguments.
All these are normal. Still for further confirmation, do consult a general physician and get your EKG done. Don't worry.