major insomnia --- help!

28 weeks with B/G twins and CANT SLEEP! I have had the worst insomnia. I sleep with a snoogle, go for walks/exercise, go to bed early, don't eat past 630-7, but still am up peeing every hour and can't sleep a wink. I have no idea how I'm functioning day to day! Lol any suggestions for assistance with sleep? I would love any feedback! Thanks ladies :) PS pic of my belly two days ago