I'm finally home - they let me come back a week earlier than they anticipated because I'd been asymptomatic for over a week, and my clot (I finally found out it was a retrochorionic haematoma) had disappeared almost completely as of Thursday. The clot itself was 35x59x48mm, which is pretty huge but still less than 5% of the placenta itself.
Retrochorionic haematomas are more common in early pregnancy, but since mine happened in my last trimester, they were obviously quite concerned. Luckily, bubby stayed put but she would have been in the right place had my bleeding not settled.
Alls good so far - have to call my OBGYN tomorrow and make an appointment to see him about continued care, whether I'm still considered high risk, and if I can return to work between now and a couple of weeks before baby is due.
Just happy to be home really