So sorry to hear of the loss of your pregnacy and baby.
In answer to your lack of bleeding question: It could be your body is reabsorbing the pregnancy. I had one miscarriage like this, pregnancy was seen on scan and seen to get smaller a week later with falling hcg levels, but I did not bleed after the second scan for a month, once my hcg levels reached zero again, I had my normal monthly bleed. For me it was more traumatic not having the physical miscarriage to grieve for the loss of the baby.
It could also be that you had already lost the pregnancy in August, and that you have little left to lose (did they say if the scan showed thickened uterine lining or if it was normal size?)
HOWEVER - ectopic pregnancies can have fluctuating low hcg levels. Please if you have further pain (including shoulder pain), do not hesitate going to the hospital to be rescanned in case they have missed spotting an ectopic pregnacy.
As for grieving, you will need to greive in whatever way you feel best for you. Some things that sometimes help are, naming the baby lost, planting a plant/flower in their memory, or buying a little keepsake.
TTC will not help with the grief in the long-term, but losing a baby does make many women (including me) want to be pregnant again as soon as possible. Take a couple of weeks before making such a decision, as hormones are running wild just after a miscarriage.
Sorry again that you are going through this tough time.