Hey, @ll
I have interviewed on 6th September 2018 and got 221g letter, visa officer keep my passport and told me it will returned you in a week, same happened, I got my passport after 10 days along with the similar 221g letter that I got at time of interview, still my case is administrative processing, I emailed them one month before, they advised me for further wait. now it has been almost 100 days since i interviewed. So your suggestions would be highly anticipated