I am 7 wks 3days pregnant with twins and had a subchorionic hemorrhage yesterday. Is this more common in twins? How worried should I be about a miscarriage and heaven forbid that happen what are the chances one baby will survive? The ER doctor didn't seem too concerned, but she wasn't an OB. I know I can't get a prognosis as everyone is different but some answers would be helpful. I'm one nervous Mama.