3 hour glucose test?

FTM here. I found out a few days ago I failed my 1 hour. I’m taking my 3 hour tomorrow and of course I can’t eat anything for 12 hours. I’m terrified I’m gonna pass out or throw up the drink. It’s not the taste of the drink (I actually thought it was good!) it’s just not eating. Anyone have any advice or a good experience with theirs? Trying to think positive and calm down before I go. Thank you!