I wouldn't have believed you and would start scheduling other people. if you were still coming though I would've told you to notify me when you were thirty min or so out. that way I would halt scheduling and prepare for you. I don't see why she said nevermind.
I appreciate everyones input! I'm still new and I could see how she would think I was just stalling or bullshitting her. But whatever, I've moved on; no point in stressing out over this haha. I'll just make sure I can get there 100% of the time or not make the appointment to begin with.
Thanks again everyone!