Marred by sores--ashamed

I have never done this before. I decided today to reach out because I simply can't do this anymore. It is ruining my life. I know my skin picking is not as severe as many, as I am a mental health therapist and have researched skin picking; however, I feel horribly ashamed and crippled by my constant need to pick at minuscule bumps on my face, neck, chest, and back. I currently have sores all over these areas. I am getting ready for Christmas dinner with my family, and there is literally ONE dress I can wear that won't show most of my sores. Even with this dress, I have to wear a cardigan to cover my shoulders. I frequently put make-up all over my chest and back so that I won't have to look at the sores in the mirror or because I am wearing clothes that show these areas, and I have to cover them for fear of someone thinking how disgusting I am. In yoga class the other day, the instructor came around while we relaxed at the end and adjusted my neck, turning my head from side to side. Of course, I couldn't relax and could only think that she saw the sores and thought I was gross. I know her and her boyfriend, so I imagined she would also tell her boyfriend about the sores. I felt so ashamed. My self-esteem is in the toilet. I feel like I am disgusting, and I feel like this is my deep, dark secret. I need help. I just cut my nails super short to try and stop, though I know this will only work for so long. I was thinking hypnotism? I don't know.