Stuck on Connecting (MoP)

So I tried logging like 10 hours ago and got stuckk on Connecting. Now I'm trying again, same thing. It also sometimes shows the "This account needs to be converted to a battle.net account warmane". I tried pretty much everything, from deleting files from Cache and WTF folders, setting the realmlist again, installing the other client, to logging from other PC's and other Accounts. Nothing worked. And the thing is, I have a friend who is currently playing, so it can't be from the server. What do I do?
Thanks in advance.