Glucose test

Nicole • After having a miscarriage in February 2014, we just found out 7/9/15 I was expecting. We had our rainbow baby on March 20th, 2016! We are now going to start trying again to give our daughter a little brother or sister! ❤️
Ok ladies who have done their test already. My doc gave me mine to take home and drink an hour before my appointment (which is tomorrow at 8am). How fast do I need to drink this thing??