Sleep with a pillow between your leg. It helps relieve the pressure on low back. You may also want to check into a good mattress topper. I love mine. Have you had your back checked to see what is causing all the pain? Best wishes.
Sissie
Make sure you do not sleep on your stomach. Best to sleep on your side with a pillow between your knees (will help keep your spine aligned). This worked wonders for me.