Hi, These difficulties that you describe are suggestive of stomach irritation due to GERD or a hiatal hernia. These both are very common and should be initially treated which changing dietary habits. It will also be aggravated by certain food or medications, stress, and smoking. You need to avoid fried food, carbonated drinks, coffee, alcohol and spicy food. You should eat more milk products, vegetables, and boiled food. Also, certain antiacid medications may be required and as a last option, it is possible to perform surgical repair of hernia especially if there are progressive respiratory discomfort and dyspepsia. To diagnose it you should do gastroscopy and if this is negative as in your case then you should do contrast X-rays of stomach. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Ivan R. Rommstein, General Surgeon