I messed up.

I drove carelessly and ruined our transmission. My boyfriend and I are now without a vehicle until at least one of our two cars gets fixed. I'm overwhelmed with guilt and worry. I've been trying to be a better person. I've been seeking mental help and even taking Lexapro. I want this to work. I don't want the world to fall on top of us. We worked so hard to build a little life for ourselves. Now I'm the guilty one with a humiliating charge. How do I cope with this?