How frustrating!
If your husband can stand it, put a fan on at night time. It will keep you cooler and it will also have that natural white noise effect that may be able to lull you to sleep. It works good for me, as I deal with terrible insomnia, and do get days of hot flash type nights.
Also, are you drinking enough water? Drink a glass of cool water before you go to bed each night and see if that helps too. Taking a good multi-vitamin?
Visit your doctor and get a work up going. You may have something more going on. They can lead you in the right direction.
You might just have a vitamin deficiency, insomnia, or even be pre-menopausal or in. There are many things it could be but you wont know for sure til you get a work up.
As for the stress which IS a big part of this I bet, it happens to all of us. Start doing something just for you. Go for a walk, start a new exercise routine, go get a pedicure, something that is relaxing to you. Got to take care of you.
Best wishes