Sympathies, it's dreadful. I'll second what everyone else has said and say force yourself to eat a small amount of something even though you won't want to at all - the nausea seems to be worse on an empty stomach. Ginger did nothing for me sadly and because I tried so much of it when I felt sick, I can't look at it now.
I lived on fruit ice lollies and sour fizzy sweets for a couple of weeks as they were the only things that made me feel slightly better. Flat coke (you can get the caffeine free stuff if you're drinking loads of it) was great too - I actually enjoyed half coke, half water though now that I feel better that seems like madness! Ready salted crisps were vaguely palatable too. In retrospect, although I worried about my terrible diet, I think you just have to do what you can to get through. And if that means a less ideal diet for a bit then so be it. Just keep taking your vitamins.
