Hello, I would be happy to help you with your question.
The most likely reason for your prior miscarriages is your uterine anomaly. Three prior miscarriages means that you are at risk for this happening again. Many women with bicornuate uteruses go on to have normal, healthy pregnancies. With regard to the HCG
level, most women have doubling of the HCG in 48 hours, and almost 100% within 72 hours. This 60% rise is not necessarily abnormal, but is obviously concerning in the setting of your prior history. A repeat level in another 48 hours should have been scheduled. Do not give up hope!
I hope that this helps and good luck!!