Thank you for your query at DoctorSpring.com
I understand your concern.
From your history, it seems like a reflux disorder, since the cardiac evaluation is normal, and I will advise you to take a combination of Rabeprazole and Domperidone twice daily for 2 weeks. It also falls under the PPI category, and has no long term side effects.
If it still does not resolve, I will advise an endoscopy, because this is definitely related to gastric causes, rather than any cardiac problems.
Please feel free to discuss further,