If you are very much concerned about your privacy in social media then I am pretty sure you must be heard about the historical face down moment for Mark Zuckerberg due to the Facebook–Cambridge Analytica data scandal. This data scandal compromised personally identifiable information of about 87 millions of Facebook users. Which was started back in 2014, through these personal data voters were influenced indirectly by the politician. Recently Facebook has apologized for this kind of data leak and faced public outcry and downfall of stocks. But today Facebook has come up with a help page where you can check whether your data was leaked or not.
Facebook has also rolled out a warning notification to inform every user whether their date has been shared with Cambridge Analytica or not. Around 87 million Facebook users were affected and most of them from the USA. 
So if you are quite anxious where you are a victim of Facebook data leak then you can be sure through this method. Just open this Facebook help page
You will see a webpage like this
If you are not a victim or your data has not been shared with Cambridge Analytica then you will see the message like this…..
Based on our available records, neither you nor your friends logged into “This Is Your Digital Life.”
As a result, it doesn’t appear your Facebook information was shared with Cambridge Analytica by “This Is Your Digital Life.”
But in case your personal data has been compromised or shared then it will be like “a friend of yours did log in”. Mean your public profile, page likes, birthday and current city etc were likely shared with the company.
So go and check it out. Facebook also has promised that they have done lots of changes in their platform to stop access any personal data of any Facebook users through any app like This Is Your Digital Life.