Dont want to patronise you but I used to treat my insomnia with alcohol and it didnt work in the long run and left me with a dicky liver to boot. Most likely you need to look at your day and how you operate and also your liquid and nutrition intake. Do you drink a lot of coffee or high energy drinks like red bull or so? I would definitely cut these out straight away. Is there anything you can do about your stress, can you see a therapist and discuss what is ony our mind? You could also contact the organisation "Mind" they have offices all over the UK and are a great resource and help in situations like this. There is nothing worse thean getting no sleep, trust me I know, I get on average 3 hours a night and have done so for the last 10 years now but it is due to ill health so I know the cause and I accept it and I must ad it I rather like being awake when everyone is asleep now as I can do my own thing without being interrupted and you can always come to PC for company if it gets too much for you.

Good Luck