One rule of thumb is that if the chest pain hurts (sharp pain) when you breathe in and out, it is likely a tight muscle. We've all experienced those kinds of pains. But if you have a heart condition, better to get any pain checked out. Keep away from alcohol, caffeine, decongestants or any stimulant. That woucl be what caused your 5 minute issue. Since I had Afib, I NEVER have coffee, tea, chocolate, alcohol, stimulant dental drugs etc.. Good luck!