Probably was the raw fish. As a rule, when away from home, I will avoid any uncooked food. There was a recent episode of several people getting sick from eating raspberries in a high end restaurant.
Raw fish can cause more harm than just vomiting/diarrhea for a few days. I saw on reality TV, one man ate sushi and got infected with parasites which made a home in his eye, causing all sorts of problems.