2 days clean but this is already hard

I don't know what to do, to be honest, I've only ever done little cat scratches with a razor blade And I only was doing it for a little while a month at most.

And yet, I still think about it all the time. I feel like I've not done enough to be addicted to anything yet, so that's why I've been kind of trying to stop so I don't get addicted because I hear how bad that is.

But I can't not think about it. Anytime I get upset or anything really I can just can't not think about it. School has been my only saving Grace because I physically can't bring my razor blade to school Because I got it from tearing apart a razor for shaving, so it's just a tiny little thing that I would lose.

How do I stop this before it gets too bad??? I really don't want to have to be like this