I have a question about my glucose test!

Cassie🌷

My OB said to schedule my appointment the day I plan to do my glucose test so we can talk while I’m waiting. My appointment is at 9:30 tomorrow so should I get there at 9? Do they take my blood at the start and an hour after I drink the orange “juice”? The orders are already in for my glucose test so I can go in whenever and take the test. But should I go in closer to my appointment time? Any advice? I don’t want to go too early then have to interrupt our appointment to get my blood drawn just to finish my appointment out.