With the D&C, they scraped all the lining out of your uterus. What you would normally 'bleed' out every month. It is probably just taking a little bit to grow back. Don't worry, by next month, you'll be cursing your period all over again!
I don't know about the nurses in your doctor's office, but the nurse in MY doctor's office can be very knowledgable and very understanding. Whenever I have a question, I'd rather ask the nurse! She answers without asking 1,000 questions