I have had severe low back pain only when lying down at night, which radiates to hips and pelvic areamam. It starts about 2-4 hours after I lay down, then I can t bend at the waist for about 15 minutes, then have to sleep sitting in a chair. This has been going on for 3 months. I had x-rays and MRI of lumbosacral which showed 3 minimally herniated disks, L3-4, L4-5, L5-S1. Dr. says that shouldn t be causing so much pain.