howdy, I regulary have chest pain, & in left arm up the neck to jaw shoulder and back of shoulder, in middle of chest or heaviness, one day asleep & it woke me up , as if my in sde or heart was shaking or rattling, scary! I take 50mg nexium a day. heart attacks on both sides of he family, start from early age. lately feeling stussed & heavy chest a little breathless. cheers trace:)