Sleep deprivation is a bit of a bugger, isn't it?
Best advice on that front - avoid caffeine after lunch, no screen time in the hour or so before you go to bed (laptop, PC, tablet or phone!), have a long soak in the bath and if you have any lavender oil, a few drops on your pillow.
Oh, and avoid alcohol. You may get off to sleep quicker, but you're more likely to wake during the night.
Drink plenty of water and have a couple of really strict days, and you should see that pesky pound disappear as quickly as it arrived.
I'm back on things tomorrow, having been all over the place over the last three weeks.
I'm cross as I'd just dropped half a stone, and I suspect it's well and truly back. So I'm not weighing tomorrow, just going to have a strict Bootcamp week. Will also get back into the exercise, which I haven't been doing as much of either, because of work as well as family events.