It is awful, sorry. I have had chronic insomnia for over 10 years, averaging 2-3 hours of sleep a night, often 0. The more you worry and anticipate during the day, the harder it is to sleep at night and you get yourself into a horrific cycle. Speak to your GP, although in my experience there is little that can be done about insomnia. I am sure you have heard it all before anyway so won't offer advice. good luck