Your suggestion about feedback is excellent. Ginger, when things settle down a bit, make an appointment w/the person who did the hiring and inquire as to why you were not selected. It may the way you wrote your resume or it could be something else...but you won't know until you ask. Once you know how the decision was made, you can then begin working on whatever it is you need to do to outshine others in the future.
Sometimes, jobs we apply for are not always the right fit and something better comes along...but I would not let this one selection get the better of me. I would most certainly be looking around to see what type of employment opportunities are open or will be opening up in the near future. Networking and putting "feelers" out w/others will help you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.