My first plane ride...alone

Tomorrow I am headed to Washington to run the Mudrun 5k with my very awesome friend. I will be flying by myself! I have never been on an airplane all alone. I have always had my sisters or friends. Usually I am lugging two kids, three carry-ons filled with crayons and baby wipes, and trying desperately to get first row of seats (they have more leg room and space) so my kids won't disrupt other passengers too bad. I am little nervous, excited, and relieved about this solo flight. I don't even have any baggage to check in or have to convince my 3-year-old that it is ok to walk through the metal detector without mommy. This will be quite the experience for me. So, wish me luck that I don't freak out!