T.D.
I had the same thing at 12 weeks with my first baby. We had tried so long to get pregnant and this was terrifying. I was teaching at the time it happened. There was a big gush of blood and water. I went in for an ultrasound and everything was fine. They told me to rest, so I did for 4 days. The blood eventually turned to brown and then stopped. That little boy is now 8 years old and has an IQ in the gifted range!I have 5 children and it never happened again. I did read that many new vascular connections (blood vessels)are being made at that time. One could have burst. I hope this is true for you!