Ok i've got gastroenteritis. what should i do?

Fluid: Stay well hydrated, control nausea and get some bed rest until symptoms have improved. This seldom lasts more than a day or two, and if it stays longer see your doctor. Drink plenty of fluids and if you cannot keep things down - see your doctor.

Gastroenteritis: Start with clear liquid like water, soda that is clear, or sports hydration drinks. Sip, sip, sip. Work up to solids with bland foods like bananas, rice, applesauce, toast, gelatin, or chicken. Avoid alcohol, nicotine, caffeine, dairy ; high fat foods. Rest. According to the cdc, viral gastroenteritis usually has a duration of one to ten days (depending on the specific virus).