compulsion/self compassion

So maybe the title wasn't the best to to put it but when you guys start having obsessive thoughts how do you stop them before it turns into compulsions and anxiety?

I cannot for the life of me stop ruminating or checking how I feel about thoughts or focusing on thoughts or creating more thoughts. I feel like I’m losing my mind. I want to scream. I try not to ruminate about the thoughts, but trying not to just makes me think about them more. I try not to check, but somehow, I still check. I want to let a thought sit in the background, but the more I try not to focus on it, the more I end up focusing on it. I don’t want the thought to expand because that feels like engaging with it, but I can’t just stop it from expanding. It feels impossible. People keep saying I’m in control of my compulsions, and maybe that’s true for the physical ones. But when it comes to the mental compulsions, I swear I have no control. It feels like I’m missing something that everyone else seems to have, like there’s some tool they’re using that I don’t have. Controlling mental compulsions has never felt possible for me. I’m starting to fear them. And every time someone says I’m in control and can just choose not to do them, I end up beating myself up even more when they happen. Or when I *choose* I guess. I don’t know anymore. If this is my fault, if I’m responsible for this, then what does that make me? I feel like a monster. I am at my wits’ end. How am I supposed to control mental compulsions when it feels like they control me? I freak out when they happen. They don’t bring me relief, they just make me panic. I want it to stop so bad.

When I was a child, before I knew this was OCD, I struggled with constant "magical thinking" compulsions (don't step on the crack or mom's back will actually break, etc). When I later learned this was OCD, it almost immediately solved it. Any time I got a magical thought, I would say to myself "that's just an OCD thought. ignore it." and it just stopped coming! Like seriously it fixed the magical thinking stuff forever. But of course the OCD has resurfaced in other ways. So naturally, I've tried to use the same strategy since I had so much success with it previously. But I wonder sometimes if telling myself "that's just OCD" is almost functioning as a reassurance compulsion? I hate how meta this gets. For example, I have ROCD that comes and goes. So sometimes I'll get a thought like "what if i'm still in love with my ex?" and then I'll tell myself "that's obviously just an ROCD thought" and will feel relief, almost like reassurance. But it comes back. So is telling myself that it's OCD a reassurance compulsion ?? It's just so weird because it worked so perfectly as a kid with the magical thinking thing.