Thanks for the suggestions. I managed to eat and keep down bananas, bread, pasta, and rice with vegetables. Now thinking about the 3 last items makes me nauseous though. It seems like I always have to eat something else.
To others suffering from the same disease and finding this: it’s recommended to avoid fruit juices high in sugar.
I’m especially dumbfounded as I thought that before there was an important police force and a mature legal system, murders were far more frequent than after.
At the same time, it’s possible I’m imagining 1632 London to be more primitive than it really was.