Sunluvva, my two off-spring don't sleep well, so they take Melatonin. They have it on prescription, but I don't know if you can get it OTC. One is on full-blown stuff after which he can get to sleep in about 30 - 40 mins, the other is on slow-release. He takes it at dinner, then is able to sleep a few hours later.
If you can't get it, you could try sleep CDs, we have tried a number of different ones and the most successful are (don't laugh) the Paul McKenna - it's very much down to what works for each person on an individual lesson, but it's a bit along the lines of self-hynosis. They work in a different way and irrespective of body's own levels of fatigue, so that might help you sleep because I'm sure the more tired that you are and the less sleep that you get, don't exactly help!
(( ))