I have a very strong constitution and have only been truly sick a couple of times in my entire life. Last week was one of them. I got a GI bug that really laid me down hard with all the yucky symptoms you'd expect. It even made me pass out at one point. That was different!
So its been about five days of nothing but listen to my insides slosh and boil. I wondered how long I should go without eating or drinking anything. By day 3 my logical side said 'eat!' So I did - a little. Lot of good it did me. I found I really like tonic water with quinine.
Today I'm finally starting to feel like normal, appetite coming back, holding things in a little longer. Wanting to go out for a run! That's the real mark of recovery for me.