Your problem may be chronic gastritis or ulcer. Normal blood routine, normal liver function, normal electrocardiogram and normal chest film do not mean that your stomach is normal.
Generally, poor appetite, early satiety, belching, nausea and vomiting, abdominal pain and other symptoms are all manifestations of chronic gastritis or peptic ulcer. After a long time, it will cause problems such as weight loss and fatigue. It can be diagnosed by gastroscope or barium meal in digestive tract.
I wish you a speedy recovery.
Supplement: This mainly requires long-term medication to improve symptoms. It's no use just eating two tablets. If you have medicine, continue to take magnesium aluminum carbonate tablets, Qizhiweitong granules and omeprazole enteric-coated capsules.
If possible, it is best to do gastroscopy (a little painful) and C 14 breath test, and then choose the medicine. If there is helicobacter pylori infection, it needs to be carved from the root. If you have an ulcer, you need to take enough courses of treatment to promote healing.