health links is great but i do think like everyone else says they will advise you not to go, only being sick 5 hrs and no other concerns, if its the puking thats bothering you take a gravol (thats what they will try first at the hospital, after hours of waiting) then go to bed, sip some tea or ginger-ale or other light fluids, if you have diarrhea take some malox or similar, if symptoms dont improve after a few days (or they get drastically worse)then think about going
good luck and get to bed