The drama of the day has now become obvious. Weather in Dallas messed up the flights. The airline automagically re-booked you with a much later flight, and a very narrow connection window, through one of the busiest airports in the country.
You've tried to get in touch with a person on the phone who can help at least make the connection window larger. For a while, the message is simply "The weather was bad in Dallas last night. We can't take your call. Sorry, goodbye." Then, it turns into "We can call you back in half an hour if you leave your number." So you leave a number, and they call you back! There's a live person on the phone, and she's helping you!
And then... silence. For a long time. And then you're disconnected. You call back. Your number is in the queue again. They'll call you back. Maybe.
This isn't what you were supposed to be worrying about today, but never fear... you will adapt, get there when you get there, and all will be well.
Relax. Breathe. Eat something, too.