Just got laid off, what should I do first? after 11 years as a production planner

I was let go as a production planner this week and I am still in shock. It has been weighing on me all week. I have a few weeks of savings and a rent payment due. What did you do in the first week?

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.