Failure is how we learn sometimes
If you never failed you would never improve right?
Interviews are a little tricky sometimes but I have found that if you just be yourself you are much happier in any job you get as opposed to just telling them what they want to hear. I guess it's where your priorities lay.. it's easy to regurgitate common accepted answers to interview questions. Everyone does it so there is nothing about any one person that will stand out.
Personally regardless of if I get a job or not, people always remember me because I refuse to be a 'drone'.
I'm sure you will do fine
and as everyone has said..you don't lose anything by trying right?