GET THEE TO A DR POSTHASTE
May be nothing or it maybe serious
8 years ago I had difficulty getting up a slight incline out of breath , went to DR 3 days later had an EKG in his office and 5 days later had double bypass under 55 years old, never smoked, rarely drank "cept good Champagne, always had my weight very much under control, BUT it was that blasted East texas BBQ that did me it