Scrupulousity is a very painful form of OCD that attacks something that many of us care about most: our belief system. I myself have struggled with Scrupulosity and it is particularly agonizing because it involves my relationship with my Creator. Christians are not the only folks to battle this horror.
I've recently come across a book about Scrupulosity that is intended for people of the Jewish faith. It is called Religious Compulsions and Fears: A Guide To Treatment, and it is written by Avigdor Bonchek, Ph.D. Dr. Bonchek is a clinical psychologist and an ordained Orthodox rabbi.
I have not read this myself, so I am unable to speak to the quality of the book. However, I thought I would mention it, as perhaps it might be useful for my Jewish friends. I hope this helps.