Interview anxiety

Dee
I'm going to a job fair tomorrow and I really need to land something. For the past year I've been trying to get on my feet making something more than $10 an hour that is not temporary and has benefits. 
Anywho since I've been working on my resume I feel like I'm going to have a panic attack because of the pressure I'm putting on myself. I'm just terrified of not getting a job, again. 
What do you do to calm yourself in situations like this?. It's finals week too so I'm really going crazy