depression,ocd and anxiety?!

hello.
Im 17 and i have had social anxiety for a very long time. I can't even walk into a store to buy something without feeling very anxious. I have also had compulsive picking for some time. I have scars all over my back from picking as well as my arms. My mom is aware of both my anxiety and my compulsive picking. My compulsive picking makes me more anxious to be around people and depressed because i feel like i can never wear certain shirts or dresses or a bathing suit. I feel depressed because even though my mom knows about both of these problems she under estimates them like they are not a big deal, tonight it got so bad i was actually thinking that it would just be easier to end my life. But I know I can't do that to my family... what can I do to get the help i need? does the compulsive picking come from my anxiety?