Help! Just over an hour ago I was on EMC but now it says 'Sorry, your username or password is incorrect!'. So I went to Minecraft.net and tried to login there... still didn't work. It said my email address or password was not recognized. Then I went to the Mojang website and reset my password over 5 times! Every time it doesn't work! Anybody knows why??
Ninja'd But any ways, there should be a contact button in which you can change your password and stuff.
Try to recover it using your email at http://www.account.mojang.com/ if that doesn't work and it won't reset using your email, I'd do what LtCaptainMe suggested and give them a call.
I had this same problem a couple days ago. It ended up solving itself after a couple hours. Calling them wouldn't hurt, but I wouldn't freak out.