TMI: possible miscarriage? PHOTO, BEWARE

Had bleeding last Friday and I went in and everything checked out fine. Today I got out of the shower, felt like I was peeing myself. As soon as I sat down on the toilet, this came out. I am roughly 6 weeks, 2 days.. last period July 9th. (havent been to the doctor yet for first prenatal appointment, it's on August 27th) is this normal? Or am I having a miscarriage? I have no cramping, no symptoms.

Adding more info, I have a bicornuate uterus, first child.