I use clonazapham and zolpidem. Zolpidem do have some side effect when you use it long term.
I noticed some of your post stating you're in UK, if you're near bristol or London. There's a FMS specialist that I used to go to, I quite like him.
His name is Prof John Davies.
www.fmsclinic.co.uk/index.php/welcome-to-the-london-and-bristol-fibromyalgiamecfs-clinics/He is quite helpful, but very expensive.