Anyone refuse there three hour glucose test, I'm not refusing but can't get to the lab until next…

Anyone refuse there three hour glucose test, I'm not refusing but can't get to the lab until next week and I have an app on Thursday, but bc of how far my Drs office is and when my kids get out if school it's making it difficult with my SO work schedule. The last time I took it I was horribly ill I don't wanna chance not being able to drive home ?? Wondering if they will want me to monitor my sugar to see what my levels are or how it'll work ... I failed by 2 points and I didn't take my test until 32 weeks.