Sushi probably has about a tablespoon of rice per piece and a roll has what 1/4 cup? Maybe 1/2 a cup so it looks like at most you will have a cup of rice. Also white rice is pretty inoffensive when it comes to stomach issues. As for how many carbs, 36 perhaps 40g or so. Definitely not anything to worry about. It is Valentine's Day (for you guys). Eat it and be happy.