Hello there, thanks for writing in. It doesn t sound all right to me that you developed diarrhoea followed by blood in stools and nausea soon after having a miscarriage as I do not have any information about your miscarriage ( surgical or medical , on its own or induced). If you ve had a surgical miscarriage, do rush to emergency room as there is a possibility that there could be a complication unless it is ruled out. But if it is a spontaneous miscarriage or a medical termination it could be unrelated to your abortion but you still need antibiotics as it is infective gastroenteritis. Even then you need to see your doctor. Hope this helps. Take care.