Insight needed Please

Libra

I'm sorry for the tmi, Is this my mucus plug, or part of it? I just happened to see it in the toilet after going to the bathroom last night. I never experienced anything like this with my first pregnancy (this is my second). I'm 39 weeks this week, i know it's not so much of a concern of loosing it at this point..i just dont know what it is and looking for insight, please and thank you.