ive been experience sudden jabs of pain in my heart over the past little while. its almost like someone is grabbing ahold of my heart and squeezing very tighly, or like a sharp piercing pain. they only last 3-8 seconds on average but its impossible to take a normal to deep breath during, and its not just uncomfortable. i used to take alot of drugs, ecstasy and cocaine ( although the latter very rarely ,while the former being a almost everyday) i drink maybe a cup of coffee every other day, stress has been minimal since experiencing these pains. ive quit drugs now for a few months and still experience these pains. should i be concerned about anything serious or could this just the muscle right under the heart and not acutally the heart, i have heard that muscle can be under alot of pressure and its normal.