Help my Facebook account has been hacked
When a Facebook account is hacked or taken over, the attacker almost always uses that account to advertise, spread spam, and spread viruses. If your Facebook account is making posts you did not personally make, or you are getting complaints from your friends or followers about spam, your account is likely compromised. Log into your Facebook account from the facebook.com web page and change your account password.
Tip: Applications you have granted access to can post on your Facebook wall. To adjust what applications can post on your wall, click the downward pointing arrow on the far right of the top menu bar on your Facebook page and select Settings.
In the left navigation pane, click the Apps option. The App Settings page shows all the applications that have some level of access to your Facebook account. Hover over the application with your mouse cursor and click the X to remove the application or click the pencil icon to view the application's access.
Tip: Friends can also post on your wall. To turn off this feature, click the downward pointing arrow at the far right of the top menu bar on your Facebook page and select Settings. In the left navigation pane, click the Timeline and Tagging option. Click the Edit link for the "Who can post on your timeline?" option. In the drop-down list, select Only Me to only allow on your wall from yourself.
Facebook password doesn't work
If your Facebook password does not work, click the Forgot your password? link under the login boxes on the Facebook website. You will be prompted to have the password reset information sent to your account's registered e-mail address.
You can also use Facebook's Find Your Account tool.
Visit the Facebook secure page
Finally, we'd also recommend visiting the Facebook secure page to help verify your account is secured.