Insomnia sucks. A couple of years ago, due to all the hormonal swings of menopause, I rarely slept for more than an hour or two at a time. Nothing much helped and I was a very, very cranky person for about a year. Luckily it stopped and I recovered my sanity. Now I still have frequent bouts of insomnia,(shift work screws up my sleep patterns) and have learned that the best way to deal with it is to get up (don't lie in bed tossing and turning, you'll just get mad), make myself a cup of herbal tea, and read something that won't raise my blood pressure for half an hour or so, then go back to bed. Generally, that works.
Hope you get some rest today. Fresh air is good, too!