hello,
i can understand your concern..
donot worry, i assume that the ecg, 
ultrasound and other blood investigation reports to be normal.
this seems more like a 
gastro esophageal reflux disease. 
i would advise an upper gi 
endoscopy for you to rule out the same, a chest xray is also advised.
a 2d echo is also advised if it hasnt been done in your previous visit.
mean while i would advise tab pan d(pantoprazole+
domperidone) for you twice a day half hour before breakfast and dinner.
avoid spicy foods, eat small portions of meal in shorter duration.
i would also suggest a 
digestive enzyme syrup like bestozyme for two weeks.
regular physical activity would also help you in this.
i hope i have answered your concerns.
feel free to ask further queries.
thanks for choosing HCM