I have had the same thing. Ask your doctor if you could have siatica? Sometimes it will not show on a CT Scan, have you had an MRI. This will show if there is any nerve impengment, which could cause the pain. This can be treated with physical therapy or something else. Check with your physican about an MRI, telling him the pain is just getting worse. Don't lift anything you think can cause more pain in the lower back. If you wish to talk more about this problem, feel free to e-mail me.