Remedy For Insomnia

I have major insomnia. I was taking melatonin but read something about it affecting the body’ natural ability to produce melatonin in the pineal gland. So, I went and bought a bottle of "Nature’s Way Valerian Root". The first night it worked. Thereafter if didn’t work. If anything, it had a negative effect. I read somewhere in a review that Nature’s Way is a weak form of valerian root. Can anyone recommend a good brand for valerian root?

FYI, I’m not interested in prescription meds. Natural remedies only.
One more thing… I bumped up the dosage a little bit these last couple of nights and have actually fallen asleep. The problem is I don’t stay asleep. Granted, I have a cat problem (neighborhood cats knock on my door in the middle of the night and then leave…since i live in a studio, there is no escape from the disturbance). When I was taking ambien for sleep, I was able to sleep solid through the night. But as I mentioned, I’m really trying to stay away from pharmaceuticals. Thanks.