Unusual Login Activity

Tried to use facebook from a different location last night and got the above message "Unusual Login Activity" . Now will not let me login at all. Wants me to identify pictures of facebook friends , I have too many to know them all so this is not an option. Am back home now but still cannot get on, still get the same message. How do i get around this?

Facebook expects you ( all of us) to log into it as the same or similar location each time ( an oddity with Facebook)

When I log in I get a notification

Hello, xxxx,

A new device named "home" logged into your Facebook account (Today at 23:50) from (location details) ( IP details)
(Note: This location is based on information from your ISP or wireless provider.)

Was this you? If so, you can disregard the rest of this email.

If this wasn't you, please follow the link below to protect your account:

link given for me to let them know it is not me

So if a log in happens that is not me I get told about it and can do something about it

In your 'back home 'situation have you checked your emails to see if Facebook has emailed you ?