The stomach gas you are experiencing can result from eating in a hurry, drinking carbonated drinks, eating certain grains, milk and vegetables, and swallowing air. Perhaps you need to look at your anxiety level. When people are stressed, many different things happen. Watch your eating habits. The speed at which you eat, poor chewing and air swallowing can occur when people are stressed and in a hurry.
Gas can form when all of the above happen.
Also, anxiety can cause the body to produce more stomach acid, causing discomfort. Try taking a walk after eating. If these things don't help, see your doctor for a check-up. Recently I've had some problems with the mucous membrane in my mouth. My mouth is dry and I feel like it's burning.