Oh. Well raw fish is definitely a danger. That’s why sushi places always tell you to be careful when eating it. So it might be that. Me personally, I struggle to eat sushi because one time I had some and it was super good so I kept getting more and eating more, until I was so full it hurt to breathe. I had the worse stomach pain ever after that. Maybe you’ve gotten sick of it? Try switching it up, and have a different kind, and see if the same thing happens. Keep trying different things, and record the results. This will help you get a clearer picture of the problem!