Sorry you're having such a hard time. Insomnia keys me up so that my anxiety is worse, which makes the insomnia worse...bad cycle. Graphic books and movies don't help, either!!

If you're afraid to tell your parents about the fears, could you tell them that you need to see a doctor for another reason? The sleep problem itself, or headaches/physical symptoms you might be having? Once you're at the doctor, you can speak to the doc about your fears and see what they suggest. This isn't something you should have to deal with alone. It's better to ask for help now than in college or when you've moved out of your parents' house!

White noise helps me a lot. I play river/waterfall/rain sounds and try to really focus on the sounds. It dulls the background noises that would startle me otherwise, too. Repeating a long "mantra" in my mind has worked, too. Milk/melatonin/poultry doesn't help me.