Check with your hosting cpanel if your site is redirected to google or other search engines.. try to change the password first. It may be that your site is hacked and hacker is redirecting your site to search engines and other sites.
It's a big problem! I would suggest you to contact your host immediately. I agreed with Agent000 comments, Probably your site is hacked.
Bit late for that now; you do realize that this thread is weeks old. Hope you not just post building to get your count up.
Your computer must have been installed by some kind of malware... I suggest to run a virus/malware scan
For a start check your .htaccess file and if there are any redirects - those (if any) that you did not create yourself! If there are such delete them and save it anew. I am almost 100% sure that this is the problem. This doesn't mean your site was hacked, more likely your host was hacked and someone put the redirect! If you are not familiar with the .htaccess codes contact your host or paste it here so that we can have a look. If the .htaccess is just fine, then scan entire site - both server and your local copy/PC for malware. I have got this problem in the past and (dont ask me how) someone, somehow set redirects for yahoo and google just for 1 hour a day. Lucky I, one time was checking my rankings exactly during that hour and noticed it. Then of course started crying at my host and figured it out... This has been few years back, but few or several weeks back from now I replied to a very similar thread to yours with same symptoms, so it seems that this shit is back...
Why late and who cares about post count??? Maybe you?!, since you are posting nothing helpful, but accusing others that are trying to help him and blame them for post counting up... Still why replying at all if you think that thread is too old, and not talking about it at all??????/ Just seems that guy's problem isn't solved yet!
It is most likely that your website has been hacked. If you are accessing it from the social media or others but unable to access it from Google, Yahoo and Bing then it is the possibility of plugin installed in your computer which is installed while installing any malicious software.
As other people stated contacted your Hosting company and tell them about a virus scan. You can even do a Sucuri Dot Net check whether your site is affected.