Thanks for writing to DoctorSpring.com with your health concern.
As such, truly speaking chances are 50 - 50.
IN half of the cases, the progesterone injections can successfully salvage the pregnancy, and in half of the cases, it progresses to a full blown abortion.
If the bleeding is severe, with clots, then go to your doctor immediately and have a repeat scan, it is possible that she has already miscarried.
In absence of severe bleeding, clotting and cramping, you can wait for 10 more days.
All the best.
Please feel free to discuss further.