I can't sleep at night. What should i do?

i have tried listening to music, counting sheep, doing math ( like really complex problems to bore me to sleep) but othing is working what should i do, (my dad has given me some medicen for it but it doesn't help) please help me I have to wake up at 6:30 everyday to go to school on the other side of town and i always look like a reck. Everynight i just lie in bed looking at the ceiling. I have gles so i can't watch T.V. while trying to sleep (which is what my mom does) please just serious answers.