disease (heart problem) in a young famale is very less common
only risk factor in your case at present is positive family history of heart disease
i feel your problem more likely related to anxiety
and panic related
do some relaxing exercise like regular walking , pranayams , yogas , reading good books , going out in nature , eating fresh fruits and fresh green leafy vegetables , positive thinking will help you most.
if you feel same problem then get one basic heart check done as it will reassure you with evidence.
Heart burn in middle of chest can cause by simple acidity problem also
take blunt , non spicy diet