The Emotional Wave

So, I've been warned about this part of graduating. The part where you are on cloud 9 and then the part when you are crying and feel like you are a complete imposter for even thinking that you could be a nurse.
Right now I am just jittery and unsure of what is going on. I have an interview for a Med-Surg/Oncology/Orthopedic job on Thursday. Totally exciting & scary at the same time. It's like in the past when I've prepared for a test, worked & studied so hard that I must know the material by now. And I think, if I fail this test then I just am not meant to be a nurse and someone else who is smarter can take my place. That's how I feel about the job, if I am not good in my interview then there must be someone else out there who has a bigger heart and greater compassion for patients, so they must deserve to get the job more than me.
I haven't interviewed for a job for over 8 years so I am definitely out of practice. I'm not really sure what kind of tough questions they will ask, but I feel that I've asked myself all those tough questions for the past 2 years. Like why do I want to do this?!
Anyway, I am excited to at least get a little bit more of my future solidified, ie. a job!! And in all honesty, I am so scared. All of my clinical experiences have been in the sheltered coccoon of my clinical group w/ my friends and an instructor. Now baby bird is getting kicked out of the nest. I guess I will sink for a little bit then gain my strength to fly.
Like I said, the emotional wave. It takes you high and low in seconds. Since I can't stop it, I'll just ride with it I guess. What else can I do?!