I think a hysteroscope D&C (Excuse spelling) they actually look into the uterus with a camera from the cervix to look for anything like fibroids, maybe damage from an accident, endo etc which could be causing your bleeding etc then they do a D&C after they have had a look. A normal D&C for a m/c for example they usally just do the curette where they basically clean the contents of the uterus out. They often do D&Cs for other reasons besides a m/c so perhaps thats why your having it now 2months after your accident and m/c.
I am sorry to hear about your accident and m/c.