Help, please!

This is probably TMI but here recently I've been having mucas like discharge and haven't thought much about it because I was told it's completely normal. I'm 27 weeks and 4 days along. Well tonight I go to use the bathroom and wipe and a big clump about the size of my thumb of something shows up on the toilet paper. It wasn't bloody at all. It was like a dark meaty looking brownish pink. It was gooey but it was solid enough it couldn't be spread out. I have no idea what it was. My grandmother is afraid it was my mucas plug, but it's not sure so she's making me go to the ER in the morning. But that's so far away. I don't think it was because I was told the mucas plug would be bloody. I've also been having, what I'm assuming is, round ligament pains. And haven't felt him move much today. But he was super active yesterday. I was hoping I could get some answers now.