THe heart pain is mostly bihind sternum(chest bone),It may radiate to left shoulder or neckor epigastrium
.it's associated with sweating.
Now you will realise, the pain you have can not be cardiac,so please leave taking tension. get a cardiologist's advice &get rid of the fear.& be happy.
&gases can produce such symtoms.you can try a digestive tonic like Vitazyme-2 spoons twice a day after food . it will give you relief.