Open Question: SIMS 3 Virus on Facebook has hacked my computer?

So I added Sims 3 application on Facebook and it's definately a virus. It tagged thirty Sims photos and randomly tagged my friends... Also, my main problem at hand is that it has either hidden or deleted all of my profile wall posts and statuses and nobody can write on my wall. If anyone knows how to fix this problem it'd be greatly appreciated.. really stressed out about it cause uni starts tomorrow!