What you are experiencing is probably not your period. It is not uncommon to have heavy bleeding, sometimes passing large clots, following a D&C. However, changing a bad every hour is a signal to call your doctor.
Yes, to a certain extent. Your body has a lot of recovery to make and a lot of adjustments. There are some questions you need to ask: What color is the blood? Is it clotted? Does it smell? Every hour is excessive contact your doctor.
Light, spotty bleeding is usually expected up to a week after a D&C. Heavy bleeding to the point of soaking a pad every hour than you should call your Doctor. There are meds that will help stop the bleeding and contract the uterus.