Update on me: the food-poisoning is now on it's 3rd day. I've had nothing to eat in 43 hours, so forced down some macadamias and 2 spoons of coconut oil this morning as I was starting to feel very weak. My brain perked up straight away but obviously my tummy is still yuck and sore. Will do this every 6 hours or so until I have recovered, so I have some energy for the kids..
Kruse, interesting that you mention leaky gut and depression. I suspect I have leaky gut (sudden on-set of food allergies to food I've eaten for my entire life). I'm about to see a naturopath to heal the gut, but if you have any basic pointers, feel free to throw them my way!