I have been losing my mucus plug for weeks now. However, last night around 4 I woke up to go to the bathroom and there was more mucus than ever before with brown streaks in it. Is this the official bloody show? I went in Tuesday and was checked in was dilated 4cm and 50% effaced. Could this be the start of labor? I also have been having pretty regular BH, but nothing thats timetable or strong. I will be 39 weeks tomorrow.