I only had vomiting and diarreoah for 5 hours 3 days ago. Eating and drinking and feel fine now. Am I stil contagious? No one else has caught it yet

Probably not. But practicing good hygiene (washing hands with soap and water or at least clean with hand sanitizers) before touching eyes/mouth or before eating is always a good idea regardless of symptoms. Many infections are most infectious when there is no symptoms.