I have always struggled with depression?

I'm 15 and have been on depression meds for 7 years. I have gone through 6 therapist and I currently have 2 therapist. I have been cutting myself for 2 years and I went to a mental hospital for a week. I have ADD, OCD, panic attack syndrome, ODD, anxity disorder and ofcourse depression. And I'm taking the highest possible dose for my meds. Everytime I feel like I'm getting better something happens and I go right back to the beginning of my progress. I feel like I'm a disappointment to my family and nobody can help me. What should I do?