tuna, 6 inch. Ate it at noon on New Year's Eve and was nauseous, weak and dizzy within 4 hours. I vomited twice, both times were orange and acidic. I felt like I was going to pass out. My husband had a steak and cheese footlong and was fine, so it was definitely the tuna. We had to cancel our NYE dinner plans and I spent the night in bed. Nausea, weakness and dizziness began within 4 hours of eating a 6 inch tuna. Shortly after I began violently vomiting orange acidic vomit.