mucus plug confusing

Not trying to be gross or give tmi, but I'm not sure what's going on. At 37.3 I went to the dr for my crivix exam. I was only dilated to a 1. However, about 2 hours later I started getting a heavy, mucus like discharge. It was heavy all day and finally started clearing up before bed time. The next morning it started again but only lasted an hour. Today (Sunday) when I woke up everything was fine till maybe an hour ago. I went to the bathroom and In my underwear, there was more brown discharge.  
Is this normal? Could it be my mucus plug? Any input is much appreciated!!!