I am really in a Big dilemma.  I really need some serious suggestion guys

I’ve got 2013 DV And I am in F1 status here at USA. , now my concerns are.

1)   while I filled the form I am single, but I’ll be getting married  next month @ Nepal,  it was fixed almost 6 months ago, under  this circumstance, can I list my future wife or not? If I filled it  after coming back from Nepal, will it create any problem?

2)   Since I am already in Usa, and will do my processing as soon as I return from Nepal, how I began with? Does anyone know step-by-step clear knowledge about how to process? Which form to be filled and where to go?

3)   What documents I need to bring from Nepal?

4)   Lasty, how the case number impact the possibility of getting selected at interview?