Kindly discuss for your concern .

It is important to understand how the patient is feeling and act promptly. Classically, it may present as a crushing, pressing, or squeezing pain. Sometimes it may radiate to the left arm, neck or jaw. It may be accompanied by nausea, vomiting, breathlessness, marked sweating, and lightheadedness but not all of the above together necessarily. Also, remember it may not be a heart attack a doctor in the emergency department will be well skilled to assess that through some tests and history of the patient. Hence, your goal should be to take the person to a nearby but well equipped hospital within 2 hours of symptom onset and if you are missing that 2 - 3 hour window at least within 12 hours. The earlier is better. A dose of Aspirin chewed or dispersed in water can be helpful but also do inform the doctor upon reaching the hospital about it. In any case do not let administering Aspirin give you a false sense of relief for preventing/resolving the condition. 

Better go to nearest hospital and  get a ECG