Are Yo-yos supposed to have Ups as well as Downs?

My life has been a broken Yo-Yo. All down, no up.
I'm seriously depressed, and I don't know what more to do. Not only am I getting NO bites on any resume'/applications I send, neither is Paul. He handles the bills, so I'm not asking, but I don't know how we're going to cover the mortgage, etc. this month. I'm sure there will be some creative juggling, but I'm just so angry that this is where things are right now.
Angry that, once again, I feel worthless & unmarketable.
Angry that I have to worry so much.
Angry that others get ridiculous amounts handed to them and they appreciate nothing.
We aren't bad people. We aren't uneducated or unexperienced. So why the hell are we the ones who must struggle so hard?