It is indeed gastroenteritis many call it stomach flu now ...same thing it just has been given a 'slang ' term .
Hi and sorry you are ill. There is no such thing as "stomach flu" meaning the influenza virus does not cause flu in the stomach. It is considered gastroenteritis. The symptoms of diarrhea, vomiting, low grade fever up to 100 degrees and possible cramps are caused by many things, virus or bacterial. However, the most common cause is a virus called Norovirus. It is spead from person to person by fecal oral contamination. It is highly contagious and so when someone in a restuarant ,or anywhere really, doesn't wash their hands after using the restroom it gets spread to another person. For example if they didn't wash their hands and prepared foods a whole outbreak will occur such as often occurs on cruise ships. In children they can also get Rotavirus in the same manner. These viruses are seasonal like the flu and so are mistakenly called stomach flu or as a slang term. The Norovirus usually goes away in 2-3 days. You need to hydrate yourself perhaps with gatoraide. If you can eat have a banana or other food with potassium. Since you just have nausea it could be other things if you don't develop diarrhea. Food allergies, and other things can cause this too especially in the lack of fever.
Yes stomach flu seems to going around in most states children have had a lot this winter and it seems to recurr..it will pass ,drink plenty of fluids ..