I'm very sorry for your lost. The same thing happen to me with my first pragnency. The baby died at 11 weeks and at 14 weeks I had no sign of a miscarriage. The doctor did a D&C right away. You need to call your Dr. and schedule one soon to avoid infection
I am also so sorry for your loss. What you have experienced is a missed miscarriage. For some reason your body is not taking care of things naturally. Now, I don't want to upset you anymore then you are, or frighten you, but you need to see your Dr. again right away. Fever and cold chills are sometimes (only sometimes) a sign of infection and needs to be taken care of. Please see your Dr. immediately and let him/her know what is going on. I had a missed miscarriage at 8 weeks, and had a D&C. It is a simple procedure, in in the morning, out in the afternoon, and that may be what you require as well. I am so sorry you are going through this. Take care, and I will keep you in my thoughts and prayers.
I'm so sorry for your loss!
I'm not a Doctor but I'm pretty sure that I've read on here that if your body doesn't miscarry naturally or completely then usually Doctors schedule a D & C to avoid infection. I think you should go to the nearest hospital emergency room and get checked out.