I also take Trazadone and I used to take Lunesta until my insurance changed and it worked really well. I also drink a magnesium supplement, Natural Calm, and if I drink it towards the evening, it also helps with relaxation. It is so frustrating when you can't fall asleep..on occasion I have that twilight sleep, we sleep with a fan on for noise, and I'm not fully asleep, because I can still hear it whirring away all night. This sometimes happens even on my Trazadone, which then makes for a very long day.
Have you asked your rheumy for something? When mine found out I wasn't sleeping, he was pretty proactive about getting me a script for sleep. I know it's yet another med, but with Lupus and RA etc sleep is important.
The last thing you need is a flare, aggravated by lack of sleep!