It wasn't food poisoning. Turns out it's an inner ear problem that's making her incredibly dizzy and nauseous. She's got some meds for it and is doing so-so. Despite the doctor's protests, she's on her way to NY with my Dad. They make the trip in two days. They've stopped for the night now and will be here tomorrow. My mother is unbelievably stubborn and she wasn't missing this trip for nothing!