3 hour glucose test???

Amber • Old soul and a cancer moon. Mommy to be June 20th 2019. Engaged to my best friend/love of my life.

I have to do this tomorrow morning. Can anyone tell me exactly what's gonna happen? Do I have to drink that nasty ass drink AGAIN? I drank it last week and i guess my results showed that i was borderline diabetic. 😐😐😐😐