Help please!!!

Wa

I had my baby Monday. Everything has been going good. Today I finally got milk to come in. So, my baby boy has been breastfeeding. Yay!!! Well, I just got done breastfeeding but I had to go poop. I went poop and I was sitting on the toilet. Then, this stuff came out of my vagina. What is it? I had my son vaginally. This is my 3rd baby. I never had this come out of me before. I'm not sure if this is a big deal or not.

UPDATE!!!!

Now today this came out of me. It didn't hurt but it was scary to see.