Girls, hi! It's been 40 weeks, but we still haven't given birth (I had…

Girls, hi! It's been 40 weeks, but we still haven't given birth (I had an appointment, the doctor said we should keep going, looked at the chair. Ultrasound was normal, everything is fine with the baby). In the evening, brown discharge started, there's also a pulling sensation in my belly and lower back. Can you tell me if anyone has experienced this? We were scheduled for delivery on Friday, should we wait or go already?