The reason for your stool being orange in color is probably faster passing of food through the intestinal tract (there is no enough time for food to absorb enough bile that gives, along with gut bacteria, stool's final color).
Very often, the gastrointestinal infection of different etiology can be an initial trigger for chronic gastrointestinal disease, like Irritable bowel syndrome.
Diarrhea with mucus with urgent feeling for defecation, are some of the IBS symptoms.
Try to pay attention to food you eat, and visit a gastroenterologist!