Welcome to HCM.
To rule out the cardiac condition ECG,ECHO is must,go for it and get relaxed.
Your symptoms is suggestive of indigestion
,acidity and is called gastritis
It could be due to stress,anxiety
, and wrong diet habbit.
Try to avoid stress.eat more vegetables,fruits and less spicy food.
Try to get your diet at regular time everyday.drink more liquids,water.....Don't take much pain killer it will again cause for gastritis.Yoga and meditation
will be helpful.
Consult physician for better guidance and medical management.