first of all...sorry to hear about your loss!
my post recent m/c was at 5w3d (ish) and i passed the clots in one day and had horrible cramps and then the following days seemed like a normal period. that was Feb. 22nd of this year and the first week of April of this I ovulated and on May 14th 2008 i got my BFP so it only took 2 (ish) months and im currently 10wks today so it can happen!
prior to this pregnancy though i m/c'd in June of 2007 and didnt become pregnant again for 8 months in Feb 2008 when i m/c'd as i mentioned previously.
My doctor always advised me to not have sex until about 2 weeks after my m/c and not to try to get pregnant until I have had 3 regular cycles.. but people get pregnant after 1.. I think it depends on how fast your body bounces back.. They say that your chances of getting pregnant after a miscarriage are higher cuz your body is out of whack and ovulates irregularly but you also have to be careful because if there is still blood and tissue that wasn't fully expelled during your miscarriage it can cause problems with your next pregnancy.. With my first 2 miscarriages I had D&Cs. The first one was really bad. I was in BAD pain for about 5 days. I think that a lot of it had to do with me not eating and taking my pain meds then I couldnt pass a BM sorry tmi but it was terrible. The second one wasnt as bad and I didnt bleed as heavily either, but I still had bad cramping which put me in bed for about 3 days. The third miscarriage I had early in my pregnancy around 5 weeks and I let my body expel it naturally.. It lasted about 4 days and was just like a period. Barely any cramping. I went to my doctor after and everything looked fine. It depends on the pregnancy I think with the miscarriage and how you feel.. could also depend on the way you go about getting rid of everything.. I became pregnant again 4 months after my last miscarriage and am now 22 weeks pregnant. good luck and I hope everything works out for you.
I mc'd at 11 weeks the day after Christmas and have been ACTIVELY ttc since and I have not gotten pregnant yet...I know some people get prego quickly after mc but mine seemed to take a real toll on my body...my cycles were irregular in length until like march or april so it made it hard to tell when I was ovulating. Sorry to hear of your mc and hopefully you'll be one of those people who get pregnant within a cycle or two =)