https://www.spotify.com/us/help/faq/account/password-reset/"In this case, you have always used Facebook credentials (email address and password) to login to Spotify. You were not asked to choose a username and password when you created your Spotify account. Almost all Spotify accounts created after September 22nd 2011 will use the Facebook login. "
:P Also, I got onto their site and it automatically logged me in (I'm guessing using my facebook?) because it says my full name at the top, but I still can't log into my account on Spotify itself. Bizarre. Ugh I might have to change my password or something.
EDIT: No, that didn't help. :P