I just don't want it to happen

Recently I've been getting into the habit of digging my nails into my palm whenever I'm stressed or angry or sad or trying to suppress something. For most of my life, I've been oblivious about self-harm, and mental illness. Only in the past year have I learned more about it and realized I might be struggling with something too.

And I really don't want to end up turning to cutting with a knife. It's so scary to me, to think about doing that, but I also don't feel like I can trust myself with anything sharp anymore for fear of the self-harm coming out and me not being able to stop it. I have no experience with things like this, and nothing has been working to stop the new behaviors.

I know the risks, and I'm scared of that happening to me, and the voice inside taking over and going too far. If anyone has any suggestions for things I could do, I would really appreciate it.