Dear as said by you..Their are few symptoms which are very specific for ischemic heart disease that in simple word we call heart attack.. Such as chest pain ,dizziness, feeling of weakness and tiredness . And the most specific one is feeling of jaw pain. Along with all this their are certain cardiac risk factors such as male sex ,age more than 40, smoking , hypertension ,diabetes ,dyslipidemia , family history etc . although the typical pain of heart attack is described as retrosternal chest discomfort diffuse pressure like with radiation to both arm and jaw increases with exertion and get subside after taking rest.but it is not necessary that all this is present. Diagnosis of heart attack is clinical that is on the basis of history . You must consult your physician for further evaluation and management . Because if it is of cardiac origin any delay is not good.hope this will help.