It is possible that the pain in your left side of the abdomen could be due to irritation from alcohol consumption, indigestion, or intoxication. To help alleviate the pain, you can try consuming light foods such as soups, broths, toast, eggs, and brown rice. It is best to avoid very fatty or sugary foods like red meat and undiluted fruit juices. Start with small portions and gradually increase as tolerated. Make sure to stay hydrated by taking small sips of liquid every 3 to 5 minutes. If the pain persists for more than 7 days without improvement, it is recommended to consult with a doctor as a precaution.