19 months admin processing

[Insha 17]

My husband had his interview february 27th 2018 in Islamabad Pakistan, they took his passport and gave him a admin processing paper. A few days later we got an email with the Ds 5535 additional questionnaire which we filled and submitted right away. Since then every time we send inquiries we only ever got 2 emails with the admin processing message, the rest of the times we made inquiries the date on ceac changes and that it. Recently we finally decided to contact our senate ####### Durbin's office for help on friday 10/04, yesturday I checked ceac and the date changed from our last inquiry date of 9/24 to 10/10 (we didnt make an inquiry this time), today I check ceac again and the date changed again to todays date 10/11. I called the senator's office today and the lady assigned to our case said she sent the inquiry on wednesday and hasn't heard back from them yet. Do you guys think the date changes are from her inquiry? I mean I dont think the embassy looks into a case that fast within 24 hours of an inquiry even if its from the senator's office. Not to mention they just check into the case and update it once per inquiry from my past experiences and this time theres been 2 date changes. Also from past experiences whenever they responded via email that its in admin processing the date changed that same day the email was sent so she should have received an email the same day the date was changed if it was due to an inquiry right? Is this a good sign? Or is it just an update for the congressional inquiry that was made? Any thoughts on this would be great, thanks!