Thanks for your question on Health Care Magic.
I can understand your situation and problem.. Possibility of
heart disease is less but better to rule out cardiac diseases first for your symptoms.
So get done ecg and 2d echo.
If both are normal than no need to worry for heart diseases.
Possibility of antibiotic induced
gastritis is more.
Your all symptoms like burping, discomfort in stomach,
chest pain etc are seen in gastritis. And antibiotics are known to cause gastritis.
So avoid
stress and tension. Avoid hot and spicy food. Avoid junk food. Start
proton pump inhibitors and prokinetic drugs
Don't worry, you will be alright.
But first rule out cardiac diseases.
Hope I have solved your query. Wish you good health. Thanks.