If you're not sure if you're infected, and you have a Twitter account, just make sure to change your password there too. For some reason, my account got jacked and I have zero idea how that happened. But to be on the safe side, I'm going to pretend it is and just warn people here.
I would also recommend doing a spyware sweep in Safe Mode if you have Windows. Do that first.
That happened to me too, actually.
I never click on links or anything like that, either.