Hello, Abdominal pain that you are experiencing is due to acute gastritis. You should always take protein while taking alcohol so that your stomach mucosal lining does not get corroded, swollen and painful. Never over drink. Take sips of water, juice, ORS. Keep your self well hydrated. Stay at rest. Take some biscuits and cookies so that you can take antacid and PPIs, one sos for relief. You can take Spasmol (spasmoproxyvon), one SOS when needed to relieve abdominal pain. Avoid oily and heavily spiced food, dairy products, packaged food, fried food for a couple of days as it may trigger your symptoms. Take semi solid food like oats, porridge, custard, etc. Pain is due to gastritis / acidity not due to intercourse. Avoid addictions if any. Take rest for few days, you will be fine. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician