hi Poca,
For me it is just normal for you to feel nervous especially like us, ENGLISH is not our first language but I think it isn't right to become a hindrance in getting what you want..
The interviewer wouldn't asked you for a personal interview if they dont think you've got the qualities they need since they already interviewed you over the phone..
Cheer up girl, I am very sure you can make it..Goodluck..
