Following lots of stress at work keeping my brain ticking over double time at night (and a relationship break up at the same time) my gp proscribed 7.5mg of zopiclone as and when required.
I don't like the idea of these things - an old ex of mine had some trouble with them...but she had problems anyway.
I take a half a one once every now and then. These things can have adverse effects on your sleep patterns if you have them on consecutive nights.
That was my gp's recommendation along with suggesting that the knowledge that the medication was there if i wanted it might help as much knowing it was there even if i chose not to take any.
I'm not recommending these for you as i don't know your cirmumstances, but in a limited way they have been of use to me.