Uneasiness in heart. Injury on shoulder?

I feel some kind of uneasiness in heart not a severe pain, it's kind of heaviness like something is kept on my chest, also feels discomfort in my left hand shoulder, kind of numbness on fingers,, here too it's not sever pain, discomfort feeling, it's effecting my sleep, I used to smoke but not a regular smoker now, smokes hardly one or two cigarettes in 2 or 3 months, occasionally drinks, less than 3 days in a month. I am also facing gastric problems, the chest discomfort I am facing it for last 2 years. Consulted doc once 2 yrs back, according to doc everything was ok, the second time it happened with severe numbness and in left hand fingers and lightheadness, doc discovered spondylosis. I even had a shoulder injury in 2009, I dint take much care then, I don't know why it's happening, due to heart problems? Gastric issue? Pinched never due to the injury on shoulder? Kindly please suggest me what to do why I am facing these problems, lately it's effecting me big time. Thank you doc.