First time jitters normal after closing?

[Eric P.]

We finally closed on a perfect house for us.  Its a little big now, but we plan on growing a family in it.  Now that we've moved in and are unpacking I find myself feeling uneasy.  Like this constant feeling of "OMG what if I suddenly can't work and can't pay for this anymore?!"  Now both my wife and I have good jobs, her for the state, and me with a small company where I handle all operations so we are quite secure (knock on wood).  We could limp by on just one of our salaries if need be, and we have about 6 months worth of mortgage/tax/insurance payments in the bank.. But for some reason I can't shake this feeling.. Is this normal??? I hope it goes away sooner rather than later.