Glucose Test after Weight Loss Surgery

Hey Mommies 👋🏻 I'm a FTM & I had weight loss surgery August 2016. The time for my glucose test is coming up & we are having a hard time figuring out what works best for me. Drinking that bottle in 5 minutes is IMPOSSIBLE! I cannot chug anything because I will end up vomiting since my belly is so small & cannot hold much. My doctor suggested finger sticks before & 1 hour after breakfast. It takes me an hour to eat so it'll technically be 2 hours. Please help! Have any of you mommies been through this?