chunky white discharge ???

Last night I had sex with my boyfriend, nothing was off, everything felt normal. He came in me. 
Then this morning, I woke up and went to the bathroom and while I was peeing I felt something come out of my vagina, and I looked down and saw a white chunk in the water. I don't know if there was more than one because I had already thrown the toilet paper in there. But what could this be? It doesn't smell bad and I don't itch.