S.F.
My twins are almost 10 months old and I bled for the first 3 months of my pregnancy with them. We were doing fertility treatments so I was getting ultrasounds every two weeks. The fertility doctor who actually was the one performing the ultrasounds could find no reason for the bleeding. Every ultrasound showed healthy babies. I did find that the more activity I had the greater the bleeding. So for my peace of mind I chose to be on my feet only when I had to (I had no other children so this was much easier for me). Also, they told me to drink lots of water which also slowed down the bleeding. Then after one particularly bad weekend of bleeding it just stopped. Best of luck to you!
S.