Holding my breath

Still waiting on the severance. Things keep changing and it's frustrating and unfair. Granted, the company doesn't have to give me a severance but it was promised to me and is still not delivered.
Tomorrow I'm suppose to pick up my last check, my vacation pay, and my severance. However, rather than a lump sum I will receive it in installments. I'll find out more tomorrow.
Today was the first day that it hit me that I have to find a new job. Today I got my first twinge of anxiety. It also occurred to me that this is an opportunity to start new, try something different. Although pay will be my main issue in my job search I feel confidant.
I'm so afraid I'm going to get some kind of bad news tomorrow. I'm trying to stay positive and keep the attitude that I will deal with whatever issues when I cross that bridge. Right now I have a strong desire to run. Where to I have no clue, just away. I want to turn off my phone, not talk to anyone and just be alone. I care that people care but it's overwhelming. All the questions of "how are you doing?", "what will you do?" being asked four, five times a day is freaking me out to be honest. I just lost my job. How can I instantly get in the mentality of a job search? I know I will have to but I just need a second to catch my breath.