You fried something. I'd go with what fastball said and undo what you did as best as possible and take it to someone who knows what is what and have them do it. You may have damaged more than you think at this point.
I'm also going to go with what Snoopy ( :gorgeous:

) said, and agree. Never ever ever do work on the car while it's running or without knowing what your about to cut. Only to have the car running if your diagnosing something. Then TURN IT OFF!! Then work.
Good luck, hopefully it's fixable. Just make sure you learn from this and don't do it again. Like fastball said... not trying to be mean... but that was a bad idea. Sorry you made it, hope it can be fixed... but for your sake and the cars sake... learn from this.