UGH! Tried to tighten stretched cables

[firenze11]

I dunno what got into me but I did some online reading and thought I could do this by myself. It seemed pretty straight forward to me. Here's some background: My bike has been shifting sloppily (is that a word?) in the front for the last few rides (inside). First I figured it was my shifting technique and then I decided to see how tight my cables were. The front derailleur cable was really loose. I thought the last time I took it to the LBS they tightened them, but I think the bike was too new to have stretched cables.

So when I attempted to tighten it I loosened the bolt, pulled the cable taught and tightened it again. When I checked the shifting it seemed perfect. Then, this is where I got in trouble. I got worried I didn't tighten the inner wire pinch bolt (thanks Park Tools website!) and checked it again. Now my derailleur shifts up and down without the slipping but the derailleur is rubbing the chain. This is what I get for monkeying around I guess. So is there anything I can do or do I just take it to the LBS - I'm guessing I just need to take it to the LBS.