Hello,
My husband and I just relocated to the Chicago area in September and completed DCF process in London. Best of luck to you!
If you look at posts in various repatriation threads, you'll find a wealth of information including a DCF timeline, links to the US Embassy website and loads of stories recapping various repats' experiences.
I can assure that, despite all of the worries, waiting and anxieties, if you follow the rules and guidelines, it's not too bad. There's just a lot of paperwork and a lot of it seems repetitive...
When did you file the I-130? Have you received a notice of approval, indicating if your petition is accepted?
If you read all of the posts here, check the embassy website and still have questions, I'd suggest emailing the embassy directly. I found that when I did this, I usually got a response within 24 hours.
Are you from Chicago?
Good luck!