Thanks for your question on Health Care Magic.
I can understand your situation and problem.
Since your extensive cardiac work up is normal, no need to worry for major heart related diseases.
In my opinion, you are mostly having GERD (
gastroesophageal reflux disease) associated pain.
It is due to laxity of gastroesophageal sphincter. Because of this the acid of the stomach tends to come up in the
esophagus and cause the symptoms. Excessive
flatulence is also due to this.
So better to avoid hot and spicy food. Avoid junk food. Avoid large meals, instead take frequent small meals. Avoid
stress and tension.
Start
proton pump inhibitors and prokinetic drugs.
Go for walk after meals.
Don't worry, you will be alright in 1-2 weeks.
Hope I have solved your query.
I will be happy to help you further. Wish you good health. Thanks.