Hi all!
I am going to my interview in the next week
I am really waiting for this moment but I am afraid too. I don't know what will be and which questions they will ask.
help me , please, i need more information about documents that they need and about whole process too.
Thanks a lot.

Take a look at the guides here. Click on the link for your specific Visa (most likely K-1).

Here's a list of sample interview questions.

You should have been sent a packet from the consulate that gives you instructions on what forms and information to bring with you. Did you receive this?

Above all, relax. Be yourself, be honest, and make sure you have all your paperwork. You'll be fine.

If you bring all the documents and forms that the Consulate asked you to send/bring and you meet the requirements there is nothing to worry about. The link that was provided by mox is very helpful to have an idea of what the CO might ask you.

During the interview, act calmly, be sincere and speak with self-confidence, if the CO notices that you are extremely nervous or unsure he/she might get the wrong impression.

Take a deep breath and RELAX you'll do just fine!