did you get any message like this "What the heck are you doing in this picture omg...? Type in website with no spaces and search your name-->www. picshuh. com" on Facebook?
please don't login there.... its not Facebook... someone is trying to collect your Facebook login details. check the URL and see its fake! In programming, that is called PHISHING. Be careful
To read more about computer crimes or learn about phishing, read my article on it at http://www.researchersportal.org/2015/09/computer-crime-about-and-types.html