Hi S.. I am sorry for your loss.
To answer your question - Although I never went through a 'natural' miscarriage (I had D&C/D&E 3x after my losses), I do know that it can take awhile for your body to get back on track, esp. if you are anxious or thinking about it!
I'd just go off the BC and see what happens. Try not to focus on the end of the year, or saying 'we are not going to try after this year'. We said that after our 2nd loss and we ended up trying for one more year, which surprised us both! :-) Once our youngest reached age 5, however, we decided not to try anymore.
So all I am trying to say is, relax and try not to worry about the timing so much, because it will happen when it happens. If you REALLY want another child then another few months (or perhaps even a whole year) won't really matter that much, in the long run, right?
Oh, and I second the acupuncturist recommendation. I cannot say enough good things about my acupuncturist and she specializes in women's health and fertility. http://lauriemorse.com/acupuncture.htm
Good luck and Merry Christmas! -Suzanne