I had thought I had the stomach flu this past Monday, the 18th. I felt constipated the previous night and had very bad abdominal pains. I woke up Monday morning around 7 am with horrible abdominal pain still, gas and the feeling of needing to go to the bathroom. I drank water and immediately vomited a couple times after. For the past 5 days I have felt nauseous in my stomach, had horrible diarrhea, no appetite and awful gas and bloating.