Thanks guys for your support.

Csab, I will ask the Dr about whether I have sub chorionic heamotoma. The senographer was showing me the blood flow on the u/s around the sac. But she didn't explain what that meant. The vaginal u/s is the worst ever. It was so painful I want to cry.

I've been thinking of other possible causes for the bleeding. I'm now wondering if my breastfeeding my 14-month-old DD has anything to do with it? As in, if I'm breastfeeding, hcG production is reduced because my body thinks that it is not pregnant and therefore produces a period around the time that it is due? Could the bleeding be "breakthrough bleeding": https://www.bellybelly.com.au/pregna...g-in-pregnancy (hope I'm allowed to post this link). Does this make sense?