Thanks for writing your query.
After reading your post, it seems that you are suffering from anxiety, if your ECG and Chest X-Ray are normal.
You should get your Thyroid profile checked and should consult a Psychiatrist
Taking antacid Omeprazole
20 mg along with Domperidone
10 mg early in the morning will be helpful in curing acid reflux
and burps. You should take anxiolytics only after consulting a Psychiatrist.
Doing yoga and meditation
and exercising in fresh air will be helpful in controlling the anxiety.
Avoid spicy and oily foods, never miss a meal and avoid emotional/mental stress. Donot self medicate especially with pain killers and steroids. Avoid cigarrate and alcohol. Drink plenty of pure water. These precautions will be helpful in controlling your symptoms associated with acid reflux.
I hope this is helpful to you.