I am also miscarring and am sad to see I have company. I wish "sticky baby dust" for us for the next try, should we choose to try again.
I started spotting 7/11, experienced light bleeding with mostly brown blood and some red, and went in for an ultrasound on 7/14. They found a heartbeat (128/bpm) and aged the fetus at 6w 3d. There were no bad signs on the U/S or the exam - but I was still bleeding. However, the next day I started cramping and bleeding more. The next day was worse. Finally I went in again today for another exam and U/S. No fetus.
I had another M/C in January at about 5.5 weeks, so they weren't able to do an U/S then. It was easier, I think, because it was my first M/C, and I didn't have a mental image. I was awash in thoughts of "well, it must be an embrionic abnormality and it's all for the best." This time I'm more in the camp of "why didn't I insist on progesterone supplements when I figured out I was pregnant?"
My friend the duola says you can bleed or you can cramp without worries, but not both. My personal experience is that I can't spot or bleed. I have a 3 year old, and that pregnancy went without incident, even though I was 36.
Depending on how far along you are, you may want to get the D&C. My doctor told me that the early M/Cs (up to about 7 weeks) aren't too painful or scary (ie, bloody). But a M/C at 9 or 10 weeks can be very painful and frightening. As I mentioned above, I had a M/C at 5.5 weeks, and it wasn't much worse than a slightly worse period than usual. This M/C at 6.5 weeks is more painful and a much heavier flow.
My doctor gave me a percoset prescription, but recommended advil and tylenol first (also, I don't think I can mix percoset with the other two). Please make sure you are medicated appropriately - you will suffer enough emotionally. Also I found some small amount of comfort in a box of See's candies. My DH is in another state and can't be with me and that isn't helping.