Layoff happened 12 days ago, feeling lost - 13 weeks in

I lost my job as an HR coordinator and I am not sure what to do first. I do not usually post, so bear with me. I have a box of my things and a short letter about benefits. Which steps were urgent?

Ask for your final pay, unused leave and any documents in writing before you leave, if you still can.

Give yourself the first couple of days to be upset. I did, and then I felt able to plan.