The internet will probably not be a good source of help, but I do have suggestions:
It's highly dependent on who you are and how you became screwed up.
For me, as an example: I came from a dysfunctional (hoarder and religiously dogmatic) family (biggest issue) and when I had a gun in my face and a guy screaming "do you want to die" at me, they didn't help me, and I went into a period of 'victimhood' for years.
Running, moving away, accepting that my family was dysfunctional helped me a lot. I'm now in the process of figuring out what repercussions and scars I have from the hoarding household, treating what I can and being aware of the rest.
When I first fired a gun, it took the magic of my assailant away - the power that he had in that gun was mine too, and that situation stopped haunting me. My self confidence literally returned from the dead overnight.
You're most likely going to be completely different. If you're like I was, you might not even know what the root cause of your problem is. That's your first task, to discover what it is; otherwise you're not going to have a lot to tell a psychologist. The only time I went in (after friends sent me in as I was very close to harming myself) all I could think of that was bugging me was "my girlfriend broke up with me" when in reality, I had much larger problems than that.
Good luck, and do try to get professional help, not because you're screwed up, but because you clearly feel like you are. Everyone has issues, the trick is finding out what they are and learning to live with them, and it could very well be your particular ones aren't as bad as you think.