I really want this job, but I'm nervous for the interview?

-I have an interview for a business coordinator. It can make me or break me, due to the fact it is towards my degree. I feel like I will say something wrong, because I always get nervous and dont talk enough. I think about something to say and I feel like I dont want to drag it out too much. I'm 24yrs old and I feel like I shouldn't have this problem.