is this a disorder?

Hi i was wondering if anyone else had this problem too. For as long as i can remember i have been a skin picker. It started with picking the skin around my fingernails. I have stopped for a month or two but now I've been at it for almost a year. I'm embarrassed to even let people see my hands and when they ask i want to hide them. My boyfriend finds it disgusting how it looks after i peel themm.. Now i have started peeling the skin around my small toe on my left foot and right foot. I would like to try to stop this as it bleeds a lot and for a couple days it hurts a lot to walk. I used to be a scab picker and picked at my scalp until it bled and would eat them. People at school would tell me my head was bleeding but I'd make up some lie. Since i was little i am a nose picker and eater. Infact, even though it sounds disgusting i enjoy the taste of my own boogers and my own blood. When i have a cut if i think nobody is looking i drink my own blood. I also pick at my acne which i know is very bad! And eat the hard sebum or puss that comes from it. I don't know what's wrong with me, but i might have OCD or ADHD but I've never been checked for it.