Can't login/change password

I can’t login in browser (or else). And I didn’t get the reset password mail.
What can I do?
It says “Wrong username or password” but I didn’t change anything and it worked always!
Maybe it’s because it’s a university access and not stable right now? (I tried it 6h ago and had the same problem.)

It works now.
But I still don’t know why I had this problem yesterday.