I was chatting with a friend, then unnecessary message were sent to him, which means other than me someone else was using my Facebook. But I have not given my password to anyone. Automatically, I was logged out of Facebook. When I tried to log in with the old password, it said my password was changed, which means somebody has changed it. It asked me my security code, but I don’t know it either. Please help!
What can I do if my Facebook account was hacked?