do not drink very often at all. I am 21, 225lbs and 6ft tall and no medical history . Iv only been drinking on and off for a period of 6 months. Three nights ago i drank a lot more than i ever have, got sick and threw up then went to sleep. I woke up a few hours later and felt fine then went back to sleep. The next day however i threw up once more in the morning and had a stomach ache and Diarrhea . The pain is in my upper abdomin or stomach area and i dont feel pain unless standing or sitting up and even then it is only intermitent. like a cramp . I have now had this two and a half days. What is wrong with me? Do i need to go to the doctor? Am i overreacting to think that i may have acute pancreatitis? Can that be caused by one night of hard drinking? is the Diarrhea caused by Gastritis? When i start feeling the stomach pain i usually have to go to the bathroom and then the pain goes away for a little while.