I'm truly sorry for your struggle. I can relate to some of it. The driving issue aside, you might benefit from some therapy. I'm not saying you're nuts but it might help you sort out the ptsd, depression, lack of confidence. You know, give you some coping tools. We all need them. I mean, it can't hurt, right?

As far as the driving test, I meant it. I believe in you. Follow the rules (including rolling fucking stops!) and ace it. You can do this. Dig deep for the confidence. It's there. You know the rules. You know you're good and fuck what everyone else is saying. Who is the driving tester guy but another human? Just ignore him and drive properly. You know how to do it so do it. No excuses.

Sorry for the platitudes but that's all I got. It's up to you to figure it out and find that confidence in you. It's there. Find it.