Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, you should get done
stress test (trade mill test). You are heavy smoker since long time, so you are definitely at risk of
heart attack. Sometimes ecg in resting condition can be normal. But when body is in exertion (stress), ecg may show changes. And hence to rule out this stress test is needed. So get done stress test. If this is normal then no need to worry for heart diseases.
Smoking is also a risk factor for GERD (
gastroesophageal reflux disease). Smoking causes laxity of gastroesophageal sphincter. Because of this the acid of the stomach tends to come up in the
esophagus and cause central
chest pain. So better to quit smoking as soon as possible.
Along with antacids, avoid hot and spicy food. Avoid large meals, instead take frequent small meals. Avoid stress and tension.
Don't worry, you will be alright. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.