Why?

Why does it seem like whenever I am really trying to get things together that's when it blows up in my face?
I'm so frustrated today... I have an offer in on the most beautiful house, HAD a preapproval from my bank for the mortgage, but now, nothing. I've contacted a federal agency that I refer my clients to, but who knows if I qualify since I have a job and actually try to do the right thing. I've never been on government assistance and don't want to start, but I'm about to start rethinking it all. I'm just so frustrated.
My preapproval was taken away because upon further investigation my job that I have now is not related to my previous position. I knew this and was upfront about it. I never lied. Now I'm worried that I won't be able to get a loan on my house and I really don't want to have to rent for the next two years to build up work history. I'll never be able to save money that way...
Well, I'll talk to you all soon.