Second Guessing a Big Move

I have made decisions to leave my job, move to another state, build a home and my spouse is going to be with me.  We can’t turn back now but I feel fear and wonder if these decisions have been the right ones for us.  I’m not sure how to feel strong or safe or right.  I read your site and it states if it feels right do it and if not don’t.  What happens when it’s too late to ‘don’t?’