Mucus plug?

So today when I’ve went to the bathroom I’ve noticed that when I wipe I’ve had a chunk of what looks to be my mucus plug on the toilet paper. Now, I do know you can lose pieces of it and it grows back or whatever but I’m only 18weeks, should I mention it to my doctor or just leave it be? This is my second pregnancy and my daughter was only 8 months old when I got pregnant.