Thanks for sharing this. I'm not a mental health professional. So I can't say anything authoritative about it. But I suspect this is simply (I say "simply"; but I know it's not really simple) your OCD trying to convince you that you did something you did not. This is a type of OCD that, I believe, is sometimes referred to as: "Pure O". Perhaps you're familiar with the concept? Family therapist, Kati Morton, has a video on her YouTube channel on the subject of Pure O. Here's a link:

YouTube

And then here are links to 3 articles, from PC's archives, that offer tips for how to stop ruminating plus links to 2 articles that offer tips for how to stop obsessing:

Why Ruminating is Unhealthy and How to Stop

8 Tips to Help Stop Ruminating

Podcast: Ruminations and Worrying Ruining Your Day?

Some Ideas to Help Stop Obsessing

https://psychcentral.com/blog/how-to...bout-worrying/