Diarrhea sat and sun. sun i started also feeling nauseous, never vomited. from mon to today, bad stomach pains is it stomach virus?can it last 5 days?

Stomach virus: yes a viral gastroenteritis can last up to a week. it rarely lasts longer than that. if it does, visit a gastroenterologist for further investigation

Gastroenteritis.: This sounds like acute gastroenteritis - nausea, vomiting, diarrhea, abdominal pains, fever, chills and sweats are all possible components of this. Could be viral or food-borne, perhaps something you ate last night that may have been undercooked or mishandled. Typically lasts 3-5 days. If it gets much worse, or if it lasts longer than that, see a doctor. Just drink fluids and rest.