Lost piece of mucus plug at 30 weeks

I'm 30 weeks and 3 days and just used the bathroom and wiped, and there was like brown/organgy blood spotting with a piece of yellowish/clear thick discharge stuff that's way thicker than normal discharge..it was like a clump. I had spotting a week or so ago like the same color blood and called and they said it was nothing to worry about unless I'm having bad contractions with it or filling up a pad. That was also only when I wiped and never went into my pants or underwear, I also never saw it again until today. What does this mean?? I'm only 30 weeks. She is extremely active right now as well