Ooh yeah, Karen, you definitely sound like you need a break. All of that alone (without the trauma of an accident) would be enough to make me gain, let alone stopping my weight-loss! Maybe instead of daily time, you could work out an arrangement with your husband and the kids to have one night per week where they take care of dinner (and clean-up!) and let you relax, preferably someplace quiet. You could make a list of activities you enjoy and rotate, or just listen to music, or even ask your family/friends/doctor for suggestions.
If the family doesn't think that's fair - they can be that way sometimes! - you could strike a deal with them... They give you one night per week wherein they take care of everything in exchange for you doing a little something extra for them.
I of course don't know how your family works. I think you do plenty already, but in my opinion the situation could turn pretty negative if you make them feel guilty for all your hard work, so an exchange seems like a peaceful solution.
And boy are those kids lucky!

When I was growing up I did my own darn laundry, did weekly housework (our parents assigned a different job to each of us each weekend), and each of us kids made dinner one night a week to take some stress off our parents. Not that I'm advocating making your kids work, but as much as I hated it then, I totally understand and am grateful now.
EDIT: I also should mention I sometimes have trouble falling asleep, and it was the worst when I had a graveyard shift job. My mother has suffered from insomnia for years, where she falls asleep easily then wakes up after a few hours, unable to fall back asleep. She was always a light sleeper, but true insomnia began when I left home at age 18 to live with "internet strangers" in Oklahoma City instead of going to college in Tucson, so it's definitely grounded in stress and anxiety. She also has a terribly stressful job and works constantly (hurray for no overtime pay on salary........).
She's tried all sorts of sleeping aids and none of them seem to work more than once a blue moon, you know? If you ever got a chance to unwind it would probably help with the sleep. Also, though you've probably already tried it, maybe nibble on a bit of turkey and drink some milk before bed (yay tryptophan!), and if you haven't already, cut back on caffeine & alcohol near bedtime.
I wish I had a miracle drug for you, but restful sleep is really a difficult thing to get. I really hope you figure out a way soon, because lack of sleep also messes up emotions, your body, and weight loss.