Someone help me cope the right way ..

When I can't control my emotions, I hit myself in the face and sometimes scratch my face hard and make it bleed. Sometimes I'll cut myself but all my scars healed from last time. In the moment I just can't control it. I have acute anxiety disorder and I get so anxious I just don't know what to do. I've left bruises and small red scars on my face and I hate hiding it. It's embarrassing and I feel like I've tried everything to help it. I don't have friends or family to go to for this kind of stuff. I'm 19 almost 20 and I've been self harming for years and it's a habit I need to break. I don't want to hit something else because I don't want to make noise or break anything. Please help.