Whats wrong with my facebook?Need help fast?

[Joseph Mahone]

I think my facebook is hacked or something,because I just checked my facebook and it said I had posted some kind of stupid advertisement link all over someones wall even though I didn't,and please tell me how to fix this because I'm afraid its gonna happen again

[A.]

Change your password and it shouldnt happen again

[baseball]

Have u ever clicked on a video a friend posted saying something like, "this is the weirdest thing ever" or "look what he did to his daughter". Once you do that, a virus is spread throughout your facebook and you send ads to all of your friends.

[Mandeyy03]

If you have opened an app or even click on a link a virus can take over your account and post many things you are unaware about. I suggest not opening any links posted.