Miscarriage over ?

Supposed to be on my 8th week and my d&c is scheduled for Thursday. But I Started out with heavy cramps and tissue coming out for 4 hours. Cramps became more frequent until 2 last ones were strong. I got the chills but no fever. I'm bleeding less now and cramps have almost subsided. Does it mean it's over? What about the placenta? Isn't it supposed to come out in one huge junk?