I have once, it was the next morning. I was so hungover and had to get up early and go to work. I had no food and just kept drinking water and I was stood up walking around all morning. I really believe if I hadn't gone to work I could have just slept through it and had some food and I wouldn't have thrown up because i've had hangovers before like that and been fine because i've stayed super still!
Alcohol won't make you sick as long as you don't over do it, being sensible is all that is needed.