I haven't self harmed In about a month but It's getting harder to stop the cravings.?

I've suffered from SI for about 2 years now and been on and off medication. But I feel like I'm regressing rapidly back into my worst stages. I thought I was cured but It came back so sudden. I just need something to help repress these feelings so I can continue normally with life. I'm 17 and just want a simple life, not having to rely on medicines or psychiatry