Hello firefox,
Welcome to the NeuroTalk Support Groups.
I'm sorry that you are having so much trouble sleeping because of your back pain. I get lumbar back pain myself so understand how bad it can be.
Have you had any tests done to find out the cause of the pain at all?
When my back is really bad, I need to make sure I don't keep my legs straight while trying to sleep. I need to sleep on my side with a pillow between the knees as well. I know every situation is different though so that may not help you.
Have you been to a physiotherapist at all?
I'll post a couple of forums below.
Spinal Disorders & Back Pain Forum
At the top of that forum above there are the "Sticky" posts or threads.
In those you can find useful information and websites.
Some of those will contain tips for treatment with lower back pain.
Medications & Treatments Forum