My parents are constantly on my ass, how can I get them off, so to speak?

I am constantly being bothered by my parents when I'm at home (I'm 18, just graduated from high school and going to college in the fall) about getting a job and college stuff I need to get done and I am seriously about to explode. Is there any way that I can get them to stop constantly bothering me? I have a job interview this week and stuff but they still pester me, and I am at wits end. Give it to me straight, doctor, am I shit outta luck?