flying at 7.5 months pregnant?

Jordan
So I live in Texas, and I'm a maid of honor in my best friend's wedding in December in Indiana. I haven't had my first doctors appointment and of course I'll talk to her, but has anyone had to fly being that pregnant, and has your doctor ok'd it? I'm terrified that she'll say not to fly! I don't have enough work time off to drive 16 hours both ways 😬 and I would never want to disappoint my best friend in any way! Ahh! I'm actually stressing about this.