I've been having this sharp pain at the bottom of my chest and when I talked to a doctor about it, they mentioned it might be due to gas. They advised getting an ECG, which I did, and I've attached the results here. I smoke about 3 to 4 cigarettes a day and have been eating out quite a bit recently because of work travel. I'm 75kgs and 5 feet 7 inches tall. What should I do next?

The sharp pain in the bottom of your chest could be due to gastritis caused by excess gas. Based on your ECG report, there are no significant abnormalities detected. However, smoking and consuming hotel food frequently can exacerbate your symptoms. To alleviate the gas and chest pain, you can take an over-the-counter antacid like **Ranitidine** 150mg twice daily before meals. Additionally, you should try to quit smoking or at least reduce the number of cigarettes per day. It is also advisable to avoid spicy and oily foods, and opt for a more balanced diet with plenty of fruits and vegetables. Regular exercise and maintaining a healthy weight can also help improve your symptoms.