Skyla IUD and Tissue Shedding??

Christina
I got Skyla inserted three days ago and so far so good. I've had some cramping at night and I've spotted maybe twice since the first day. 
My question is: is it normal to have some tissue shedding? I went to the bathroom and noticed that there was a light pink clot/chunk looking thing in the toilet. Just wondering if anyone else has experienced this?