Thanks for your question on Health Care Magic. I can understand your concern. You are mostly having acute gastritis due to stress, tension and drugs you are taking for embryo transfer. All your symptoms like gaseous feeling, rapid pulse rate, mild breathlessness are commonly seen in gastritis. Your symptoms are relieved with release of gas. So all these favour gastritis more. It is common and no need to worry for this. Avoid stress and tension. Be relax and calm. Avoid hot and spicy food. Avoid large meals, instead take frequent small meals. Take proton pump inhibitors and prokinetic drugs. Drink plenty of fluids orally. 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.