What cause bloating, nausea, throwing up, diarrhea, fever to 101?

Gastroenteritis: Generally may be due to one of several viral infections and this should clear within a day or so. The fever is a little higher than usual, and if this does not clear rapidly you need to see a doctor, since there are bacterial and parasitic causes which will require therapy. Stay well hydrated. If you cannot keep anything down see your family doctor asap.