Drug related insomnia?

When I was about 2-5 I lived with a person that drugged me before I fell asleep. When this was discovered, i was placed in a different home. They obviously didn't drug me. Ever since, I have had problems sleeping. I can't fall asleep for hours and hours, and when I do finally sleep, I never get deep sleep, it's more the type where if someone walked into the room, I'd awaken. I have racing thoughts about everything from plans for the next day, to people that I've met, to different styles of music. When I ask my mother about it, she says it's anxiety. If I had a cough, my mother would link it to anxiety somehow, so I don't believe her. I've asked doctors, and not one of them even wrote down my symptoms. Benadryl (spelling) doesn't work, neither does Nyquil or warm milk or exercise, or meditation, or yoga, or breathing tecniques. Could this all be related to the fact that I was drugged when I was younger? If so, what can be done. (I know I'm not the best speller, but I'm 15 years old...give me a break).