What scares you? Do you have nightmares? If this is the case I can tell you what I did as a youngster to stop nightmares. A more modern approach to dealing is dreams is called Lucid Dreaming, another way to take charge of what one dreams about and either modifying or forcing a wake-up.
Hello and hope you are doing well.
Please don't let the fear get the better of you. Try to divert yourself, read a book. You should not keep thinking about sleeplessness, as this in turn promotes insomnia and it becomes a vicious cycle.
There is a circadian rhythm for all living organisms. It is a 24 hour cycle rhythm and the biological clock within that individual adapts to this rhythm.
If you observe this rhythm, the transition happens gradually, like the daylight subsides slowly into darkness and the sounds too gradually mellow down into the night. These changes condition us and promote sleep. So, nearing bedtime, do not engage in activities like exercise or dancing or other means that can keep you active.
So, simply imbibe this and transcend to sleep normally/naturally
Hope this helped and do keep us posted.