I'm very nasuas, have midline pain just above belly button. went to er, had ct scan, it said fluid filled loops of small bowel are present.whats that?

Several: possibilities. Most worrisome would be a small bowel obstruction (they wouldn't have sent you home). More likely are either a viral intestinal infection or an ileus (temporary paralysis of the bowel muscles), either of which could cause your symptoms. Fortunately, both will go away on their own. Just stick to clear liquids until you feel better. If your symptoms worsen, return to the ER.