Oh Myrrh, I finally got over here and read of your news. I'm so very sorry about the miscarriage. I have had two myself and while it is more common than most people know, I know from those experiences that it is a real loss and real trauma. Oh, I am sorry and will think of you in the days to come.
You are right that any loss is bound up in previous losses and near misses....old wounds, new wounds, we grieve them all, every time. I'm glad you are aware of this. Give yourself space and time to be sad, away from the energy of DB'ing or piecing or whatever and the need to be on top of things. Time to mourn.