Hi there
I had a subchorionic haemorrhage at 9.5 wks, thought I'd lost the foetus, but it was still hanging on (albeit with a slower heartbeat).
The subchorionic haematoma was directly behind the foetal sac, and measured about 5cm x 2cm (the same size as the sac at the time). If the clot had come away after that, it probably would have flushed the foetus out as well. I was on bed rest for 3 days, and then had to take it easy for the next 7 weeks while the haematoma healed. Gradually, it shrank away - I had occasional spotting, though no more haemorrhages.
So after the initial scare, all has been fine and I'm now at 36wks.
My doctor was Christine Choy. I've read a thread on here giving her a bad rap, but I had no problem with her (I switched to a different doctor who could deliver at Matilda). She was very caring during a scary time.
I hope your haematoma also heals up and your pregnancy continues uneventfully. Best of luck.