@freakedouttttt,
If they haven't come to your house in 2 days I doubt she called 911. Sheesh - this girl has lied to you about everything else, why would she suddenly start telling the truth about that?
Oh, and it's not exactly kidnapping, seeing as you spent, what, a half an hour with her and took her home. That's not kidnapping. That's driving.
And in case the cops do arrive (and they probably just had a really good laugh at her expense if she did call and bitch about you), get a lawyer and tell him or her what you told us.