Hi Trina,
An interview usually means that the embassy need to clarify the information you provided and perhaps want to see you in person.
Not to worry, if you have everything in place.
You may want to bring extra stuff with you, like photos, reference letters from your side (e.g. parents, uncle etc who attended your wedding).
I realize that this is stressful, just be positive.
Can you tell us what you provided with your initial application?
Best Wishes
