Milos … I want to move forward but I don’t know what to do.

I don’t know what site is reporting my site had a black hole exploit … I don’t know where this URL is reported, it does not exist on my site … if it did exist, I don’t know when … I have never had malware reported on my site or any kind of injection reported in years. Google nor any other site reports a problem. There is nothing I know of to fix … so what now?