Thanks for your question on Health Care Magic.
I can understand your concern.
By your history and description, possibility of
acute gastritis and related pain is more.
But better to get done ecg and 2d echo to rule out heart diseases because left sided
chest pain is commonly seen in heart diseases.
If both these are normal then no need to worry for heart diseases.
You have
hiatus hernia. And due to over eating you have acute gastritis.
So better to avoid large meals, instead take frequent small meals.
Avoid
stress and tension. Avoid hot and spicy food.
Start
proton pump inhibitors and prokinetic drugs.
Go for walk after meals.
Don't worry, you will be alright but better to first rule out cardiac diseases.
Hope I have solved your query.
Wish you good health. Thanks.