I went to Psychology Today to see what they had to say about “religious scrupulosity.” To no surprise, the writer of the article (Fletcher Wortmann) says that faith is never enough for OCD (Obsessive Compulsive Disorder). Fletcher says...

For someone like me, no longer a true believer but still haunted by religious concerns from childhood, it meant cutting all ties with Christianity, willfully and deliberately violating any creed that didn’t agree with my personal values - consequences be damned.

...There are no definite answers to these questions. All I have are my own best guesses, wrought from reason and experience and faith – answers more flexible and more compassionate than those of the doctrine and the disorder that both told me, each in their own way, that I was damned for thinking the wrong thoughts.

SOURCE: https://www.psychologytoday.com/blog/triggered/201211/struggling-scrupulosity

Oh how wrong he is! (he's correct about being damned.) I say that kindly, but truthfully. There are definite answers to all questions, and those answers are found in the eternal words of God in our beloved English King James Bible. Fletcher says, “All I have are my own best guesses, wrought from reason and experience and faith.” Proverbs 14:12, “There is a way which seemeth right unto a man, but the end thereof are the ways of death.” Fletcher is relying upon human reasoning and experience. When he speaks of “faith,” he means faith based upon his own rational and experience, which is no faith at all. At least not faith in God.

So we already see that one of the biggest causes of religious scrupulosity is unbelief. John 1:5, “And the light shineth in darkness; and the darkness comprehended it not.” Fletcher, admittedly, is still walking in darkness, because he has not comprehended the light. Fletcher is blinded spiritually, because he has admittedly rejected Christianity. John 12:35, “Then Jesus said unto them, Yet a little while is the light with you. Walk while ye have the light, lest darkness come upon you: for he that walketh in darkness knoweth not whither he goeth.” Kindly, Fletcher needs to get saved before it is too late.