I think many people can relate with this problem, eventhough I'm giving a personal description
Ever since I was young I had extreme trouble with sleeping. I think I can best attribute it to nightmares, I was tormented by nightmares since I was young. Something which worsened this is my memory (which could be classified as eidetic), and after years some dreams still appeared so vividly to me (while I was awake) that I just decided to keep my eyes open until I fell asleep (between the ages 7-11 I'd say).
A lot of years have passed since but I still just can't fall asleep at night. I don't have any nightmares anymore and I'm not scared, I just can't fall asleep. It has worsened even more during this break from school (2 weeks). For example, tonight I didn't sleep at all and got out of my bed at 9AM, ate some breakfast and then slept until 5PM. While annoying, during the break this is not a disaster. But during my school week I feel it is extremely detrimental to my performance and concentration.
What I think are possible causes for this:
Often before I go to bed (in the hope of falling a sleep) I read a book on my eReader or I check my mail/read the news on my iPad. My mother told me frequently that using a computer or laptop or similair devices before sleeping causes this insomnia.
I might just have too much energy to fall asleep at around 10PM (which is what I want). My ideal sleeping time would be from 22:00 - 06:30, but I'm usually not even remotely tired until 2:00.
Before I go into bed I usually do mathematics, and I think this could have some effect?
Irregular sleeping patterns. Twice a week I have to wake up at 06:30, twice a week at 07:00, once at 08:00 and the remaining 2 at around 11:00. I must add that I almost never manage to actually wake up at 06:30 and I've gotten into a lot of trouble because of this, with my school.
Do I have insomnia? What are the causes for this? And finally, how can I resolve this issue?