I Have Been Back From A Deployment For A Little

I have been back from a deployment for a little over a year now and tend to go through cycles of being able to sleep through the night and then a week or so where I have very restless sleep and end up awake around 0230. I have tried Melatonin and things like Tylenol PM. They seem to help for awhile and then nothing. This week according to my sleep tracker, I have been restless for an average of 59 minutes a night. What are some other things that don't have crazy side effects?