I have sporadic, sharp and cramping chest pains on the left side of chest?

Musculoskeletal: Sounds atypical for heart disease especially if not related to exertion, breathing or other symptoms. If it is worsened with deep breaths, it could be pleurisy, PTX or pericarditis but these are both usually persistent not sporadic. Does it hurt to raise your arm or move in a particular position? In any event, check with your doctor this week and be aware of any new or progressive symptoms ->ER