Just got laid off, what should I do first? after 18 years as a graphic designer

I was let go as a graphic designer this week and I am still in shock. There are 18 people counting on me, so I am trying to be careful. 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 9 months ago, and it got easier once I kept a simple log of every call and form.