You may well have stopped reading by this point as 14 pages of people mostly saying the same thing and not what you want to hear but just in case and as I have an active name change…
I also have a lovely home, well educated, love good wine, two beautiful children, a respectable job and yet I am one of “those” families, we’ve been on a child in need plan, several safeguarding checks , early help several times, reports stating my children are at risk of severe harm, (obviously there’s a back story but for this it isn’t necessary).
so, what will happen is a SW will come to your house for a few hours - I’ve had ones that have been here for over four hours. They’ll talk to you at length, they’ll observe you with your child, look at bedrooms, in the kitchen, want to use your loo at some point. If your child is at nursery they’ll visit them there.
my advice, stop looking at them as an enemy or to be scared of, they are part of the puzzle to keep your child safe. You are another part. Work together. Be honest, as so many have said you did something, your partner did something, now you work out how to move forward. The focus is moving forward so it doesn’t happen again.
Your worse fear is they will take your child, they won’t unless they have a very very good reason, the system is over stretched they’ll want to put cheaper things in place if at all possible, parenting courses, monitoring visits/meetings, home start etc
What will help you is to let go of a sense of things like this don’t happen to people like me, this isn’t fair etc, accept this is where you are and find a way so it’s a thing that happened once many years ago and you go back to your “respectful” life with no further contact with them.
Also it’s ok to say your struggling, you’ve gone through a lot, tell them, look for support don’t let thinking your not that sort of person/family stop you from seeking and accepting support.