Facebook Checkpoint - Locked out of my account?

[john]

When I go to log in, I put in my login info, and it takes me to a blank page, with nothing on it. It takes me to the URL https://www.facebook.com/checkpoint/

I tried logging in on the facebook app on my phone and it gives me the message, "In order to regain access to your account, facebook needs to open a browser" at which point it also takes me to a blank page. I've reset my password and that didn't help. Can someone please help me??
edit: I posted on one of my friends profiles the other day, something that I suppose could be construed as a picture with nudity, even thought technically I wasn't. But I haven't received any notifications that my account was temp. suspended. How can I get in contact with facebook to find out?