I tried to wait for a D & C as well, but I finally just had to get it as my labor never progressed. I was in "labor" for a week, in a lot of pain, and nothing would come out. I also got the news at a normal doctor's visit, waited till I spontaneously aborted, but eventually I got the D & C.
For me it seemed to hurt a lot but I've heard others say it was just like a bad period. I was further along though at 19 weeks.