I scanned through this and the information seems fairly helpful: https://statuslabs.com/blog/facebook-hacked
If you used your Facebook account to login to other sites (i.e., if you used the "Continue with Facebook" or "Login with Facebook" option) then those sites are potentially compromised as well so need addressing. As a general rule, I never login to a third-party site with Google or Facebook for this reason. It's a bit more hassle creating a separate account but it mitigates the impact from scenarios like this.