Hey there, I have had this same issue for years. It's really annoying. What I try to do is just reassure myself by reminding me that if god is all knowing, he knows about my OCD and he knows my true intentions and I shouldnt worry about this. We are not our OCD.
I’m not Catholic, but I’m Greek Orthodox- so a lot of similarities. I know how that be. I’m so sorry. I hope you get better :(
I am Catholic, but my fear is me going to hell.