dude, if it was after heavy drinking, and you are ok now, dont see a doctor. yea, I did that pretty recently. first of all I was sick to begin with, second of all, I had about 2 drinks worth of pucker and 8 shots of whiskey in like 1.5 hours. third of all, I had not had much to eat all day. the combination made me throw up blood. I threw up, then I felt so much better it was awesome.