Treatment for redness and scars.

So when I was in high school I had this horrible addiction with picking at every little thing on my face. If it was a pimple, bump, or whatever, I had just had to mess with it. It got really bad in my sophmore and junior year when I started to pick at my pores on my nose. ( Disgusting, right?) I hated myself, I would get so stressed out about it, and feel so ashamed. And I would have to walk into work or school around hundreds of people with a red, bloody face. That was probably the hardest time in my life, and I still regret it to this day. I'm now 23, and I finally haven gotten to the point where I can stop hurting myself. Unfortunately, I think the damage has been done. My nose is now a shade of red, and parts of my face is has a different color than the rest of my skin. My cheeks are already rosy red, (their just that way naturally.) So basically I feel like my face is just one big tomato. I was wondering if any of you guys knew about any medication or ways to get my skin back to the way it used to be? I would greatly appreciate any help. Thanks in advance! Ben