The original family is in my library, but it the save was like four generations in, a lot of lots I didn't save. It'd feel weird having to "redo" everything.
Besides that, I also remember it wasn't just one save, it was three, and they were all gone. I still say something weird was going on, but nobody else has access to my computer, so unless EA can delete saves, for whatever reason, I have no idea what could've happened.
I appreciate everything everyone's said, but I've decided to just start over with a new family and build from there.