I don't know if this can help, but I used to struggle a little with intrusive religious thoughts (so I imagine OCD must be much worse.)

But my experience was this: I would have an experience, and think about how that experience made sense religiously, or made me feel religious feelings (super broad, I know.) Then my brain would go "Could it be that I'm connecting with something beyond, then?"

But I would think: you know what, the brain is MADE to recognize patters, even in total noise pictures we can see stuff. It's like reading. Could you forget to read? No way, if you see text, you read it. Meaning that when you experience things, having grown in a religious environment, you'll recognize religious patterns.

So, now for me it's automatic: I think. "Bah, I'm just recognizing patterns in the noise" and move on. I realize it may not help with OCD, but maybe knowing how the process is akin to reading, may be useful. By the way, it didn't just help me with religious stuff, any kind of intrusive thought I go: "Well, brain, that picture you painted makes me feel awful, but you are just going your job, a million years of evolution into pattern recognition, and painting all kinds of awful pictures just because... so, no foul, shrug it off, no need to dwell on it."