Food poisoning. Had nausea, cramps, fever, chills, and watery diarrhea (orange color) lasted 24hrs, 2 days later I am having smelly gas rumbling belly?

Probiotics. If symptoms has otherwise subsided, can consider a trial of probiotics (kefir that can be found in most supermarket would be fine or you can find fancier brands in Whole Food or natural health stores - try to get the ones in refrigerated section as they tend to contain higher live bacterial counts then the capsules kept at room temperature). Normal GI flora was disturbed by the gastroenteritis.