Hi! I think I know what happened with Mrs. P, I have a cat called fuzz, when he eats lizards in the garden he gets sick for a few days, he does not eat, he vomits and he sleeps a lot.
I still give him some medicine for the stomach and he recovers soon.
So it could be a lizard that caused the discomfort of Ms. P.
It is very possible that she ate something that didn't agree with her. I just hope that she gets better soon