Hyperemesis with strange cravings

So I've only been able to keep down baked potatoes and salty pretzels for the most part so far. I mean, that's all I've eaten. Other than that, I have had a mcgriddle from McDonalds bc I like the pancake bread taste. Weird. I know. But today... I'm craving sushi. It's so off from everything else and I'm terrified to go there. I've controlled the vomiting so far. Idk if this craving is a bad thing or not but I've been thinking of cooked sushi for days ugh. What to do.