Interviews

I have an interview today at 2pm and I am scared to death. I think it is normal to worry but since I have been working on getting a job since June this interview is important. The last interview I had was the worlds shortest interview, it was 5 minutes long. The guy played it off as though he was busy and just wanted to explain a few things but I think he took one look at me and was like ummm hell no! The interview I have today is for the Vaughan Group , which is a real estate company and I would be working with condos. I am interviewing to be an administrative assistant/property manager. I just feel like I am not prepared for this, it did not help that she wanted to interview me right away leaving no real prep time. I am sure I could do the job but I just feel like I do not have enough experience to have a "real" job. All of this might be normal but it sucks. I just don't know how to answer some questions and what if one question blows everything for me or what if this interview is another short one like the last where I will walk out knowing I have no chance in hell. I feel like I need this job but I read some where that no one needs a job; they need air, they need food....blah blah blah. I just want to move out of my parents house and get a place of my own. I guess I just need to go in there answer the questions as best I can, be myself, and ask questions of my own. Thats all I can do....BLAH