I'd been spotting for close to a week... I'd had hcg levels checked and ultrasounds done.
When I did finally miscarry, I knew it was going to happen about 40 minutes before it did. It happened just as we arrived back home. I managed to make it in the door and got to the toilet.
The pain wasn't huge... TBH I was expecting more. There was copious amounts of blood and clots. I remember passing the sac and what I assume was the beginning of the placenta. I continued to pass clots ranging in size from 5c piece size to 2x 50c piece sized for 3 days... after that the clotting stopped and the bleeding turned into light spotting and eventually stopped. The whole process took less than a week.