Trouble sleeping: need something

I have been having trouble sleeping a few years now. I've tried a few things, but none work that good. It has gotten better lately, and I am only taking Melatonin, but I need to stop that because of my health condition. What would be a good natural replacement. I did a saliva test a few years ago and my thyroid looked good, but my adrenals were a bit eratic. I feel stress now. Not sure of what that is do, but some good be detox reactions. My doctor prescribed some things including l-theanine.

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