EEeeeek it is horrid isn't it. I had a similar reaction, but didn't throw up- I thought I was going to pass out or throw up in the waiting room though and looked like a beached whale with my feet up on a seat and head back taking in deep breaths while people waiting for other path lab results and tests stared at the crazy pg lady. I stopped myself from throwing up while I waited though because if I did she said I would have to do it all over again as not having the sugar in my system would affect my results. I hope you are feeling better hun, and I agree that it is a huge sugar rush basically, but keep an eye on it, and definately call your carers if you can't keep anything down. Good luck.