Eating something like bread before drinking alcohol will line your stomach, also drinking water between each alcoholic drink will make it less likely that you are sick or get a hangover. Mixing milk and alcohol is more likely to make you sick as the milk will curdle.
Belching, also known as burping, is the act of expelling gas from the stomach out through the mouth. The usual cause of belching is a distended (inflated) stomach caused by swallowed air. The distention of the stomach causes abdominal discomfort, and the belching expels the air and relieves the discomfort.
Is it Gas or Ulcers? Gas accompanied by severe stomach pain and digestive problems can result from ulcers. Ulcers, which are caused by bacteria, can cause stomach pain (especially pain associated with eating), vomiting, nausea, belching, and indigestion. Ulcers can form in any part of your digestive tract, but most often form in the lining of your stomach, esophagus, or the beginning of your small intestine (the duodenum).