I suffer from anxiety and depression. The anxiety is mostly in the form of severe social anxiety, but I usually have a high level of anxiety when driving. I have a fear of driving or of being in a car on the highway, but that is tolerable. The social anxiety really isn't.
I have been depressed most of my life. I have periods of major depression. When not experiencing major depression, I usually have a milder depression. I had one period of major depression with psychotic symptoms when I was 16-17 years old. I would hear voices talking about me and I felt I was being watched. I spent several hours some days looking for hidden microphones and cameras in my room and in the bathroom. I knew logically that there were none, and the voices were not real, so it was not like schizophrenia. I've tried to kill myself twice, but that was a long time ago. I don't think I have really been happy since I was about nine years old, but the depression did not become severe until around age 13.
My problems were not caused by drug use. Drugs just make me feel better. No antidepressants have been effective in treating my depression. I doubt if it will ever go away completely.
I probably also have Schizoid personality disorder or Asperger's syndrome. They have a lot of overlapping features. I definitely meet criteria for Schizoid PD. I also meet the criteria for Asperger's, just not sure if one of the criteria "restricted, repetitive and stereotyped behaviors and interests" is strong enough to really apply to me.