Girls, tell me, did you guys have a small walk in the fresh air? A lad…

Girls, tell me, did you guys have a small walk in the fresh air? A lady came in, went to the bathroom and discovered some very small discharge with blood. 37 weeks pregnant. What could it be? Have anyone experienced this? How long after that do they give birth? The plug is slowly receding sometimes. Or is it better to prepare for delivery at the hospital? This really scares me. And I wanted to ask, can I already give birth at 37 weeks?