Yes, the complication thing is a huge factor. And I have never had complications besides a little brown discharge with my son but he actually stayed in there 10 days after he was due.....2/5 and he came on Valentine's Day!!!! And he was fine.
ANd if you do have history for m/c and other conditions, you probably should go straight to the doctor but since EVERY pregnancy is different, even those who have had issues in the past should be patient because I believe that some of us got d&c's too quickly....and that is just my opinion but some stories sounded hopeful and weren't.
I was told that I was 10 weeks when in reality, I was only about 4-5 at the time. That makes a HUGE difference in ultrasound pics and blood work. So I stayed stressed out and uncomfortable for two weeks....that was horrible.