The best "alternative medicine" to a sleep disorder could be as simple as exercise. I suggest that if anyone tries this, that they start out slow, and gradually increase the exercise to the level that best fits them. With exercise, I believe strongly in eating right...eating foods that are non-processed if at all possible...and eat lots of "live" non-cooked foods too.
I've also heard that a person has to be careful with using Valerian; in that it should only be taken for a few weeks at a time, but not permanently.
We would not be able to speak directly for your sleep disorder for definite answers, as we don't really know.... But I hope that I've helped.