What is the most logical next event?

How to ease sudden chest pain 
Recognize the symptoms of a heart attack. 
A heart attack occurs when the arteries that feed blood to your heart get clogged, blocking off blood flow. This damages the heart and causes the chest pain associated with a heart attack.

Pick from:
I. In some cases, the blood gets knocked out of the arteries, leading to symptoms of coughing, shortness of breath, chest pain, or a permanent heart attack. Excessive cough: the clots in your heart rupture and help the blood flow around your heart to shut the artery.
II. The chest pain experienced during a heart attack can be described as dull, achy, squeezing, tight, or like a heavy pressure. It focuses around the center of the chest.
III. This is a result of excessive blood flow to your heart. Lumps and cysts in your heart often cause pain and tension in the arteries that draw blood.
IV. The pain can last anywhere from hours to days and if its intensity becomes unbearable, you may need medical attention as soon as possible. Symptoms of a heart attack include : Difficulty breathing chest tightness shortness of breath or chest tightness fatigue bone pain Get prompt treatment.
II.