If he is actively looking for a job then relax and let him do it. I am sure whatever stress you feel, he feels the same times 2, so any added stress you give him will just make the situatio worse. If he isn't looking for a job then I would be a little worried and maybe he needs help. A lot of times loss of a job can be a pretty traumatic event and he could be depressed however it sounds like this was his decision, so he is probably looking for another job. These things take time, so bear with him and he will figure it out. The important thing is that you two are a team and need to act as one even if things do get bad for awhile otherwise you could lose a marriage over a job and that would just be a shame.

Take care,
OE