Leaving on a Jet Plane . . .

. . . and my dog is coming with me as a carry-on. I'm a little nervous, since this is the first time I have flown with her. Does anyone have any advice or suggestions? She does really well in the car, but she also isn't confined to a small carrier, either. I just hope she doesn't bark or cry. And I hope there isn't anyone with a dog allergy on the flight! It may be weird and uncomfortable for her for a few hours, but I know she would prefer that to me boarding her at a kennel for two weeks. I would miss her too much! How could you not?