H1B, H4 Visa

Hi. My H4 visa interview was on October 2, 2019 at Calgary, Canada. My husband is in USA, he received his i140 in August 2019. He do not has a stamped visa. So, for interview i carried all the required documents along with form i797. The first interviewer raised question for this and asked me to present primary applicants visa. Later fingerprinting was done and i moved to the last interviwer. She asked me that they are unable to trace the documents online. And asked me again and again that if my husband is still in US or not. Later she said that they do not see any problem in my case and just need the document verification from USCIS and have sent the email to the USCIS for the document verification. As soon they receive the response, they will proceed my case. She took the passport from me and handed me a form called administative processing, but i dont need to do anything like sending documents or anything. Finally she said that normally passports are received in 3-5 days.but for me it may take some more days.
Actually im in canada with my 6 month old baby. She is already due for her immunizations, that can be done once we reach US. At this moment im worried about the further process. I want to know if someone has faced similar situation? How many days USCIS takes to respond to US consulate.
Your suggestions and experiences are welcomed. Thanks in advance