@clintflint - Severe insomnia is different from just not being able to sleep for a while because you're thirsty though. I never thought it was that big of a deal until I started taking a new medication that meant I had trouble sleeping.
It is really awful to lie awake and not be able to sleep, no matter what you try and no matter how tired you actually feel. If you had proper night sweats and hot flashes on top of that it would really be terrible. I guess that happens to a lot of women when they go through menopause, because I can remember my mother complaining about it. But I never appreciated how bad it can be until I suffered from insomnia myself.