HELP!!!! sign of labor?

Hey guys, I'm currently 39 weeks 2 days pregnant and I went to the bathroom this morning and noticed my discharge was brown (like my period just ended). I got checked yesterday afternoon, and Doctor said I was 4cm but I hadn't had real contractions, so we scheduled for an induction on Saturday morning. My body feels like I'm about to start my period. No contractions have started yet and I have been feeling my baby move a lil. Is this something to be concerned about or is it just the start of labor? Any advice on what to do?