Oral glucose test

I have to go in for this test in the morning tomorrow. I was reading up on forums on how it went for other people. It seems that if u puke you have to repeat the test again. I still suffer from morning sickness specially on an empty stomach. How do they expect me not to puke if I have to fast for this test? Any suggestions or help would be appreciated. I hate needles so I really don't wana have to go back to do this test.