After reading through the posts, I see a couple of common threads.  First of all it apparently started out of no where (she is 15).  She is in choir and constantly singing.  She has had continuous sinus infections that the primary care couldn't get to go away with over two courses of antibiotics.  She now has another sinus infection.  During these she would try to cough up the phlegm/mucus.  And this is how it starts.  She also has Ehlers/Danlos Syndrome.  Rubber Band Man Syndrome.  So now what?