Should I go to a psychiatric ward?

I am not sure if I am depressed. I seem to have lost self control. I am in high school and have gotten all As with a few A-s and a B. I am a good student you can draw. I am taking my first AP classes this year. I have gotten drowned in hw. I am up until 1 every morning and through all that time get 3 problems done on the hw. I love learning, but I can't get myself to do the hw. A- C D- F are my grades. They're outliers in my record. I want to hurt myself because I know this whole failure is mine. I don't do hw. I fail tests. I never have time for anything. I want to improve. I don't want to admit my failures b/c then I am acknowledging that I can't handle it, while my peers effortlessly glide through it. I would be acknowledging how inept I am to adapt. Unlike most I feel like depression and ADD are excuses for personal failures and not using self control. I believe people can fix it if they try. So this makes my diagnosis of myself all the more difficult. I feel like I am suffocating during school. My teacher talk to me about my struggles and my eyes well up and I must restrain myself from bursting into tears. Diagnosis?