Today when I logged in Facebook, no 2FA was shown.
I have been using SMS message as the second authentication factor. When I looked at the security settings, 2FA seemed to be disabled. I immediately set it up again, and performed the security check (change password, check phone number, posts, comments) offered by the "Not me" log-in option.
Since I usually use Facebook on semi-public computers, the account might be hacked. Are there any other things that I should do to protect the account?
I assume that there should be some SMS confirmation before succeeding in turning off 2FA, but I received none. Should I worry my phone's security? Also, although I didn't reuse my Facebook account password on other sites, are there other credentials I have to change?