pregnancy

Hi I am 10th week pregnant, suddenly today morning in my sleep heavy bleeding happened. And when I went to rest room to clean it, I found some (medium size potato) stuff fell in the commodes. I was very frightened and went to doctor immediately. But like a miracle when doctor had an ultrasound baby was fine and moving and heartbeat is normal. Even doctor didn't figured what's that stuff. And he said he can say anything if he see it. By God's grace I am feeling fine now, bleeding got stopped. Can any doctor help me what's my problem.