Poor friend, she has my sympathy - I've had several m/cs, all but one without bleeding, but also two pregancies with lots of early bleeding: red, brown, pink, the lot. I can relate to pretty much all possible outcomes, and I feel for her - the worst time is not knowing.
She will probably be given an internal (vaginal) ultrasound scan, to see if a foetus, and hopefully a heartbeat, can be seen. It might be a bit early for the heartbeat, if her dates aren't sure, but they should be able to see something to give them an idea of whats going on. They'll probably also do a blood test, to measure HcG levels and see if the u/s makes sense in view of the hormone levels. If the situation is unclear, if she's earlier than 7 weeks for instance, they might ask her to come back for a repeat HcG test two days later to check hormone doubling times.
I'm afraid its impossible to tell anything much from her symptoms...or even from the pregnancy test...I've had all of those, and things go either way. Only way to know for sure is to get the u/s and blood test. I wish her loads of luck!