It is normal to have gas, burping, nausea, vomiting, or acid reflux and loss of appetite in early pregnancy. In the early stage of pregnancy, due to the influence of hormone secretion in the body, you will show pregnancy reactions and a series of physical discomfort, even drowsiness and weakness, which will disappear after the third month of pregnancy. If you have chronic gastritis, gastric ulcer or duodenal ulcer, these symptoms may occur, or if you eat improperly, overeat, or eat too greasy or poorly digested food, the burden on the stomach will be increased, and the phenomenon of gastric distention will also occur.