agree with dear james, I was in the same position 4 years ago, I felt depressed in the same way and frankly thought about death.
now I'm here to share my experience with all people suffering the same pain as me. Peyronie's is a terrible situation but it is not the end of the world. I had one of the worse possible cases (2 big plaques find details in my posts) but I survived and cured. I have no problem (sure it is not exactly the same az pre-Peyronie's).
The first step stop thinking about reasons and what happened to you that you are suffering this. find a doctor who knows and has experience about Peyronie's (my first doctor just said me take E vitamin and wait), don't waste time start oral treatment and believe or not it works.
no one knows the exact reason and treatment of Peyronie's all they know it is a complex situation, so do all is good for your body and improve your overall health situation. quite drinking, smoking do some exercises eat healthily. take multivitamins and antioxidants as much as possible, pentox
worked on me.
there is a complicated health situation there, so leave it alone for a while, I stopped having sex (yeah even masturbating) for one year.
never never do self-treatments (you will read tons of topics about vacuum and tension devices here) if your Peyronie's is not stabled and is not mature do not do anything despite oral treatment.
this was my way, as there is no exact treatment find what work on you.