Your symptoms sound like gerd. Ulcer pain is typically a midsternal, burning, gnawing sensation, and can be quite severe. Ulcer pain is generally relieved by eating but will return once the food empties into the small intestine. Have you seen any pattern with your symptoms and the type of food you have eaten? Some people have specific foods which trigger the symptoms. A food chart or diary may prove useful in this case. You can track which foods trigger the symptoms. Do you take simthicone for the gas pains? This can help with that aspect. Avoiding white flour products often helps with gerd. Try to use whole grain breads and pastas. I hope some of this is helpful.