The worst thing about insomnia is perhaps not merely not being able to get to sleep, or waking up and not being able to get back to sleep, but having to face going to work the next day. I have always been a good sleeper, but my late husband, who died of a heart attack, was the worst insomniac I had ever known. He only use to get to sleep a few hour before he had to get up and go to work, and this went on year after year, until he died, maybe because of the sleep problems. Anyway, there are apparently five types of insomnia:
https://www.livescience.com/64534-insomnia-5-types.html?utm_source=ls-newsletter&utm_medium=email&utm_campaign=20190118-ls
“There's a new way of looking at insomnia. Rather than just considering sleep-related symptoms, a new study from the Netherlands branches out to look at personality traits and emotions, and finds there are five types of insomnia. The findings may pave the way for a better understanding of the causes of insomnia, as well as the development of more personalized treatments for the condition, the researchers said. The study, conducted by researchers at the Netherlands Institute for Neuroscience in Amsterdam, was published online Jan. 7 in the journal The Lancet Psychiatry. Insomnia affects an estimated 10 percent of the population. The main symptoms involve difficulty falling or staying asleep — for example, people with the condition may lie awake for long periods before being able to fall asleep, or they may wake up too early and not be able to fall back to sleep, according to the National Institutes of Health.