Don't worry about it. Almost everyone who gets busted for CP is a frequent uploader to a site that gets shut down. Being an incidental visitor won't amount to anything.

I run a tor node, it's my public service. I'm banned damn near everywhere (wikipedia, most banking sites, etc). I am sure that people use my connection to download CP and commit all sorts of wild crimes, but I don't do it for them. I do it for people who desire anonymity for all those neat philosophical reasons.

Despite all that, I've never been "caught" for any of the acts that people who have used my IP/connection have no doubt committed with it.