Login Always Unsuccessful

Any time I type in my email and password to get into my account, I'm told its invalid. I got the email to verify my email and went through all of the steps. I used both links provided in the email. And, when I would use the link provided by my teacher for the class before I was able to create the account, I would click the register button. I would always be prompted to excepted the terms and conditions, but then be sent to a page that says "We are having problems authenticating your account. You will need to logout and log back in." I never had put in any information to login or register. Even with an account, I still can't "login." Not sure what to do. Is there a waiting period of time I have to wait until my account is able to be used?