3 people unfriended you?

[Carleshia]

My daughter accidentally clicked a link on our pc stating "3 people unfriended you on facebook..see who" now whenever I post on my page and some1 replies there is a hacker that comes on (signed as me) and leaves nasty replies back..Ive changed my password and I do believe that soon I will change my associated primary email address( im running outta options here) so if anyone can tell me as to how I can get this hacker/virus off my page..or maybe if anyone has dealt with something like this any advice would be greatly appreciated thank you