About to

Okay so I'm in a hard situation. My life is pretty awful and I get bullied and my parents are divorced I have anxiety and my brother ruins my family. I've always had thoughts about cutting myself and I did it once and it felt like the anger and sadness was flowing away. I stopped though cause someone caught me. I feel like I'm gonna start again. And I don't want to. But it feels like anytime that life starts to get better things get awful again. Are there anyways to clear my mind or stop myself?! Please I really need help.