Hello and welcome to health care magic Looking at your history this could be due to any of following Drug induced gastritis Liver disease like hepatitis pancreatitis or gall stone mal absorption syndrome or inflammatory bowel disease in my opinion you should consult a gastroenterologist for examination and investigations like blood test for hemoglobin CBC Liver function test and imaging like ultrasound or an endoscopy you can take omeprazole plus antacids for stomach hyperacidity have plenty of fluids and fresh fruits Have adequate sleep for at least 6 to 8 hours avoid stress and anxiety as well as smoking and alcohol avoid fried fatty food and carbonated drinks Hope this helps you best wishes