Hi M.,
I echo all the other sympathetic messages, and remember those days all too well. I had three miscarriages before our first son, one between the boys, and then a healthy boy and five years later a girl! They're all grown up now. :-(
I will say that my mother always swore by having a D and C (and she was a natural childbirth advocate and practicer in the 40's and 50's! so it's not like she was into medical procedures) and when I had my third m/c I had a D/C and got pregnant successfully right away, and I had a D/C after the fourth and again had a successful pregnancy. Especially with the way you're just spotting brown blood, a D/C would get it all over with and, as my mom would say, just clean you all out and make it that much more possible for a good start on a new pregnancy.
I recommend the D/C for many reasons. Going through a 'natural' miscarriage is just a total drag--I did that with the first two, and it's all the pain and work of labor without the wonderful results. Why suffer through it, when you can get knocked out, have the procedure done and go on with your life without waiting for the worst to happen? The gal who miscarried for six weeks? Why would you do that to yourself? Have an ultrasound to confirm there's nothing viable there if you must, and then have the D/C!
All the best of luck, and as you can see from all the other posts too, miscarriages are very common, as well as successful pregnancies afterwards.
Oh, and I caution you against thinking that it's anything you did or CAN do to cause or prevent it--it's NOT YOUR FAULT!!! It's just nature's way of correcting a mistake. And it totally SUCKS! It messed up my life for years, and the memory is still painful, 25 years later!
Best of luck, keep us posted!
L.