Food Safety Report: Hacienda Mexican Restaurants, South Bend, IN, USA 1 year ago • details 68 Comments Comment Suspected food poisoning. Symptoms: Nausea, Stomach Pain, Headache, other: Really bad acid reflux Suspected source: Not sure Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: Me Additional information: I ate dinner at Hacienda at 7pm last night.