Here’s how to find out if your Facebook was hacked in the breach
Visit this Facebook Help center link while logged in: https://www.facebook.com/help/securitynotice?ref=sec.
Scroll down to the section “Is my Facebook account impacted by this security issue?”
Here you’ll see a Yes or No answer to whether your account was one of the 30 million users impacted.
Those affected will also receive a warning like this atop their News Feed:
TechCrunch
https://techcrunch.com/2018/10/12/was-my-facebook-hacked/
Facebook breach saw 15M users’ names & contact info stolen, 14M’s bios too | TechCrunch
https://techcrunch.com/2018/10/12/facebook-breach/
Facebook details what information hackers accessed from 30 millions users – 9to5Google
https://9to5google.com/2018/10/12/facebook-details-hack/amp/