blog hacked? Where to go for help?

I've noticed my blog appears to have been hacked in the last couple of days. There are google searches showing up with the blogs name, http://thefilmbox.org/ followed by a strange name. For example http://thefilmbox.org/free-latest-bangla-natok-download-rdsfnw

That is my site but obviously not my page. And there are a few of them. It's like there are roaches in my website. Any idea what this could be, how it happened, how to get rid of it, or where to ask for that kind of help? Thanks!