As you mentioned, the site is not accessible right now, probably because of that domain transfer.
It is hard to see what the problem might be without seeing the original content of your url. But in general, the first thing I would do is register with Google Webmaster Tools and use the "Fetch as Googl" function to see how your page is seen by Google. Is your own content showing up, or something else?
If it's your own, just submit the site for reindexing (maybe with a good sitemap) and wait. Google will update relatively quickly.
If Google doesn't show your content, you got bigger problems. Possibilities that come to mind:
- The DNS configuration is not fully working - giving yourself a different DNS resolution than Google and potentially the rest of the world. Maybe your domain transfer fixes that.
- A bad plugin or security breach could have replaced the site's content for Googlebot with something else (cloaking). Compare your site content with a known safe backup.