I'm at my 3 hour glucose test an I threw up 20 minutes after drinking the drink. She said it has to be in my system for…

I'm at my 3 hour glucose test an I threw up 20 minutes after drinking the drink. She said it has to be in my system for at least an hour for it to work or we have to reschedule! I don't want to reschedule!!!! I know I don't have diabetes an my test was just a little high bc I had a lot of sugar! My results were 147 an to have diabetes it would be like 200