Things could still be ok for your friend. Maybe she is not quite as far along as she thought.
Maybe the baby was not in a very good position. I know of a woman who could not find a HB at 6 weeks or 8 weeks. The doctor said she was miscarrying, she refused a D&C, at 9 weeks the ultrasound found a perfect little bub with strong HB.

Help her to try and hang in there and try and get another ultrasound in a week or so, especially with no bleeding. I don't know much about this sort of stuff, but I wouldn't be agreeing to a D&C until it was absolutely confirmed that she had miscarried.