You don't have say much to people, nothing like the full story with bells & whistles. Just "x s now x. I don't want to go into it now." should be enough. You might find it helpful saying it to yourself out loud a few times, so you don't trip over it at first.
I'm so sorry, it's shit at the moment.
Start those ads asap, so you get their help sooner.
Hope the girls are OK, and your head is better.
Someone suggested, on another thread, that to help get to sleep to go through the alphabet choosing a name for each letter. I've found that pretty helpful.