Would anyone know of any online Shiurim on the topic of religion-related Obsessive Compulsive Disorder.
Searching YUTorah for "OCD" produces this list of 11 shiurim on the topic. The one of those shiurim that I've listened to was carefully researched from both the Torah and medical perspectives, at least two others are by people I would trust to be careful with these issues, and incidentally, 5 are given by doctors. They include halacha and hashkafa shiurim, and two shiurim about the teshuva of Rav Asher Weiss regarding OCD mentioned in @Shalom's link above.
(Religion-focused Obsessive-Compulsive Disorder is also known as "scrupulosity"; using that term may help you search for related articles, etc.)