it has been a month since I submitted the co-sponsor's documents that I was required to submit in the interview wich I had on October 2nd.
I'm tired of waiting and I'm starting to get worried about our case.I'm wondering if it's normal to take them long time to contact me or something is up.
any help will appreciated !

All you can do is wait. Everything is normal for Casa. They may have processed your paperwork and are still doing name checks. You can always email them and ask if the paperwork satisfied the requirement.

yes this is normal.

once you satisfy the document requirements you may have been sent to AP for the securuty checks.

like Maggie wrote---e mail casa and ask.

good luck and ihope your AP goes swiftly!

chi