Interviewed at US Embassy but no Visa due to lack of req'ts

good day! I was interviewed at US embassy already but I haven't received my visa yet because i still have lacking requirements to be submitted like the visa screen and my contract with my employer. I've been expecting my visa screen to arrive considering i have submitted already the requirements right after i have passed the nclex but it seems there is a long delay in the processing of my visa screen. so my question is, if in case there will be retrogression this month of october will i be affected of it despite of my interview at embassy has finished? is there such a thing as a reserved immigrant visas for those who were interviewed already considering there is an assurance that the lacking documents will be forwarded to embassy once they get them?

thanks,

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