Watery green diarrhea and sour stomach yesterday sour stomach with nausea vomited once eating and drinking fine no fever no chills just stomach & naus?

Viral gastroentertis. Change your diet to avoid fatty, fried foods and overly sugary foods. Increase your fluid intake. Avoid eating large meals and instead eat smaller meals every 2-3 hours. If no improvement in 3-4 days see your doctor.
Gastroenteritis. The combination of diarrhea and nausea or vomiting is usually due to a viral gastrointestinal infection or food poisoning. In either case the condition resolves after a few days without specific treatment except light diet,rest,adequate fluid intake,and drinking flat ginger ale which helps nausea. Obviously if symptoms don't resolve or worsen, have an examination by your physician.