I can tell you what I did, but of course what helps one may not help another. As one who did actually physically throw up, I can confirm that it's absolutely grim. I still can't look at dried apricots even nearly 6 weeks later as having undigested ones come up whole was truly revolting.
Here's what helped me (some of the time):
Ginger and lemon herbal tea
Flat ginger beer
Plain, bland carbohydrates - mashed potato, jacket potatoes, rice cakes, plain boiled rice, noodles, plain digestive or Rich Tea biscuits, plain bread and toast (white, not wholemeal/granary), cream crackers
Ribena if you can't stomach plain water
Baked beans and tinned spaghetti
Cheddar cheese
Tinned tomatoes (the whole ones) on toast
Breaded chicken steaks
Cereal, especially Weetabix
I personally couldn't stomach any fruit or vegetables - even the smell of vegetables cooking made me rush for the loo - and even now I still can't eat red/yellow/green peppers although I'm back to eating everything else.
Hope some of this helps, and that the sickness passes fairly quickly. I was lucky - I only had it badly for two weeks, but that two weeks felt like a lifetime so I know what you're going through.