As HB says, print out the info for husbands page out, it's really helpful, they need to understand what is happening.
I did this with my OH it turned out he had worked it out already, he wasn't any more helpful mind!
As for the offspring, break it to them you are not feeling good, and just need some time out from being hassled by them.
It's much easier if you say you are not feeling good, to both husbands and kids.
Hope things improve.