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So back to your question: 1  Your chest hurts when you're emotionally sad because your brain processes physical and social pain in the same brain regions (dACC and AI) (the affective aspects of the pain). The fact that both pains overlap means the factors that decrease physical pain also decrease emotional pain.
Chest pain is angina. Angina can sometimes me a symptom of a heart attack. When you have angina that is a crushing chest pain, besides diaphoresis/sweating, heart-burn, you feel weak and tired. Plus is the chest pain is not disappearing,then you are most def. having a heart attack.