Help!

Chasity • Mommy to a beautiful baby boy👶💙 Baby #2 due in February 💛💛

My baby girl made her arrival on Monday, and I am currently 5 days pp. Yesterday, i went to the restroom before bed and had this clot fall out of me. It felt like i had just given birth to a ball. Its only happened once, the rest have been normally sized. Should I be concerned?