My self harm addiction

I've been self harming for around 5-6 years now and it's only gotten worse. I used to do it a few times a week to help cope with past trauma and my mental health but now it's something I can't stop, let go or escape. Now I do it every day and half the time I don't have a reason for doing it, sometimes I just want it for no reason and it's seriously getting worse, my legs/thighs look horrible and so do my arms. I've tried getting help and doing other coping mechanisms but nothing seems to work I always go back to self harm and it's starting to prevent me from wearing certain clothes and going out because I'm terrified of what people will think or say. I just don't know what to do anymore I can't stop it.