how long did it take for you to miscarry?

Laur
In June we found out we were going to miscarry after an ultrasound revealed the baby had no heartbeat anymore. Two weeks later, I miscarried naturally at home. 
Now, I'm pregnant again, and was told at our first ultrasound that our baby was measuring 5w6d and was supposed to be 8w3d. No heartbeat. A week and a half ago, we went for a follow up ultrasound which revealed it had only grown a day in a weeks time. Still no heartbeat. We know a miscarriage is going to happen. For the past two weeks I have been cramping and it's been getting slightly worse. BUT, it comes and goes. Every time I think the miscarriage is finally gonna happen, the pain lessens. I have spotted two times in the past two weeks. Every time I see blood I think it's gonna happen and then... Nothing. 
Last time I feel it happened quickly. This time, I feel like my body is playing games with me. I have refused a D and C but would like to know how long you ladies had to wait before it happened.