The best thing to do until your friend gets there is to put her in a carrier so she can calm down. Our avian companions are so in tune to our feelings that when we get stressed over something that is wrong with them it makes them that much more stressed trying to figure what is wrong with us. If you can put the carrier in a quiet dark place this will help her to relax.
I would never attempt to pull a broken feather unless there was someone that could help me do so, to try and attempt this by yourself is setting you up to damaging your relationship with her.
Best of luck!