HELP- burnt orange colored urine

I’m currently 35 weeks pregnant and for the past week or so my urine has been severely dark like a burnt orange color. I’ve been drinking water like a mad woman because I thought maybe I was dehydrated but no matter how much I drink it’s still a burnt orange color. I don’t see my doctor until next Thursday and I just want to know if anyone else has experienced this?! Do I need to call the on-call nurse?? They also haven’t checked my urine the past two appointments.