Missed Miscarriage at 13 weeks

Mariah
I just left the dr. And I found out my baby is gone. Friday wouldve made 14 weeks. Im devastated, especially because I just heard the heartbeat at 9 weeks. 
The dr. couldnt find a heartbeat today, so she did a quick ultrasound to confirm. My baby stopped growing at 10 weeks and 5 days. 
She told me I had options on how to continue since my body hasnt started showing signs of miscarriage yet. 
I can take a pill, get a d&c, or go through it naturally (if it starts by christmas). 
Im really unsure of which route to take. I want it to be over with, but a d&c sounds intense.
Anyone have any advice?