Experiencing stomach pain, diarrhea, or nausea? Learn the signs of food sickness and when AFC South Charlotte can help. After holiday parties and big family meals, feeling sick to your stomach can leave you wondering if it was something you ate or just a passing stomach bug. Many people experience nausea, vomiting, cramps, or diarrhea soon after heavy meals or foods that did not sit well. Understanding the signs of food sickness and when to ...