Sharp pain in chest jaw below left breast, numb pain in arm clear ecg ett echo,borderline hi cholesterol.family hist of heart.could it still be heart?

Coronary pain?: The symptoms of coronary pain in women is almost exactly what you describe. With high cholesterol a plaque can temporarily obstruct a coronary vessel, and give rise to the symptoms you stated, and an EKG and ECHO would be negative after the plaque passed. It is important for you with a family hx to see a cardiologist for follow-up.