tips on how to not feel nauseous after GD test

i'm having my GD test done the 24th and im nervous about possibly throwing up. i have a sensitive stomach when it comes to super sweet things especially in large amounts. they already gave me my drink and it's a 50mg orange glucose drink, told me to start drinking it 30 minutes before my appointment and to finish it within 5 and that i can eat whatever i want to before hand. is there something particular that i could eat before that may help my stomach handle it better? they also prescribed me zofran to take before too when i told them i was worried about puking after drinking it