There were two facts happened after your successful interview and they are:-
1- Your case need additional prove (Form 1-134 Affidavit of Support).
2- Your case has to go through Administrative Processing, which is not related to the missing 1-134 Form, if you brought it or not, they will only ask you to bring it, when they finish Administrative Processing, so you can say in general Administrative Processing is not connected in any shape to the applicant documents (whether are complete or not) at the time of interview.
I am in the same boat with you, the only thing you can do, is just to wait their call, mail or whatever method they have to notify you by it, I think they informed you during the interview about how you will come to know when the case administrative processing completed, if not call the embassy and get this information.
You had successful interview and completed your missing documents (Form 1-134) so now relax, cause for sure you will get your visa printed on your passport, just prepare yourself for maybe long days or weeks waiting period, and continue your life normally as your not DV winner, this what I am doing now, so much busy with work and family, and no more interview and visa tension and stress.