Postpartum bleeding? TMI

I’m 11 days PP. the last few days I have been spotting brown/old blood and it was light, and today I randomly passed this clot. It’s around the size of a ping pong ball and soaked my pad. Is this normal? While I was trying to clean myself I was also trickling blood all over the floor. It freaked me out. I am thinking about waiting to call my doctor to see if it persists because I don’t want to overreact.