I was prescribed trazodone for sleep when I was 14 and for most of my life I couldn't sleep without it. Luckily, I didn't have to keep increasing the dose though. I'm still on the minimum dose, 50 mg, and I sleep well with it. Without it, I'm usually up all night.
I did do a sleep study. I didn't think I had apnea, but was wondering about restless leg. The results were normal though. There are sleep clinics in my area, but most of them only deal with apnea, not other sleep issues.