Severe lower backache and discoloration of urine for over a week now?

Get evaluated: This could be simply kidney stones lodged in your urinary tract & the pain will persist until they pass or you get them treated. It can also be something worse.

Agree with F: It may be a combination of stones and infection. It is imperative that you seek medical care at the earliest to prevent permanent damage to the kidneys. Wish you good health!