Falling asleep strugglez

DO I HAVE SOME SORT OF SLEEP DISORDER OR DOES EVERYONE FIND IT HARD TO FALL ASLEEP AT NIGHT??? Istg I can never be one of those ppl that falls asleep as soon as their head hits the pillow, I'm always tossing and turning for hourz :(( does anyone have any suggestions for fixing this (melatonin doesn't work on me anymore)