After 3 weeks of using WordPress on my localhost, I finalized my website. With excitement I moved everything on my FTP (replacing the previous website). Then I go to the url to confirme it is online and I get a WordPress login box. I'm thinking it's a bit weird but ok, I input my login and password and I click "install" because I have no other choice. Then I'm online on my url/wp-admin.php and I only see an empty blog... I ask a colleague to go to the url, she sees an empty blog instead of my customised header+many tabs and contents I prepared.
Then I go to localhost/wordpress and it tells me "error establishing database connection".
Did I lose all my articles? How can I access to the admin page now? I didn't move anything.
I'm a beginner, obviously and I've been looking through the forum but didn't find the exact same thing happening to anyone.
Thanks in advance for your comments.