Lower to mid back pain and dark urine

Patient: I had dark urone 1st timevon Friday. On Sat. Urine wad darker still 1st thing in AM.almost brown. Now lower to mid back pain that seems to be getting worse. I took 4ibeprophen at 11pm along with regular LYRICA and gsbapentin for peripheal nueropathynow trimg to decide whether to go to ER