Sad thing. I hope you get your stuff back.
But, AFAIK, addons don't load until you load you character, so they're not "up" when you type your password. And if you got your addons the "regular way", that is archived in a .zip o .rar, then probably addons weren't the problem. UNLESS, you got someone packed up in a .exe, that's a whole different story.

Anyway, you could tell us which addons you installed recently so we can keep an eye on those.