I'm not seeing the right website

Hi!

I just started up my new website http://www.linsvensson.info, and this morning it worked fine, I could see all the changes I made etc.
Then all of a sudden I get logged out of the admin panel,
and I see my website with another theme and none of the stuff I just fixed. If I log in all the themes are gone, and all the plugins. I have the same problem on my other computer but it seems other people see the right theme :/

I’m using Chrome and I’ve tried clearing the cache, restarting, opeing in IE, with no luck at all.
So what is happening to my website? I just payed for a domain and now I cannot use my website properly.