Food Safety Report: Wendy's, Franklin Boulevard, Cambridge, ON, Canada 1 year ago • details 5 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Cramps, Chills Suspected source: sour cream Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: Me Additional information: I am still having intermittent cramping 6 days later