Facebook Temporarily locked my account!

So I just got home from work and I try to open facebook on the iPad and it tells me that Facebook temporarily locked my account. "We've locked your account because someone recently tried to log in from an unfamiliar location. Please help us confirm that it was you who tried to log in." Then it has a button that says continue but the screen just keeps reloading. This happens on the iPad, the computer and my phone. It's not even allowing me to go to the next step and I can't contact facebook support because I need to be connected to facebook to do so and I'm locked out. Has anyone had this problem? How long will it be locked?

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