Layoff happened 13 days ago, feeling lost - any advice?

I was let go as an accounts payable clerk this week and I am still in shock. Any experience at all would help. I have a few weeks of savings and a rent payment due. Is there a checklist I should follow?

Thanks for writing this out. I went through something close to it 14 months ago, and it got easier once I kept a simple log of every call and form.