Your symptoms of chest heaviness worsening with smoking and improving with burping strongly suggest gastrointestinal issues like acid reflux (GERD) or indigestion. Smoking relaxes the valve between your stomach and esophagus, while burping releases trapped gas. For temporary relief, over-the-counter antacids or acid reducers (like famotidine or omeprazole) may help. However, because chest heaviness can also mimic serious heart conditions, it is crucial not to self-medicate. Please see a doctor to rule out cardiac issues. Quitting smoking is highly recommended. Seek emergency care immediately if you experience shortness of breath, sweating, or pain radiating to your arm or jaw.