I have a question. Did your daughter begin having the pain before or after beginning on the asthma medication? I don't know anything about what type of med she's taking but wonder if perhaps she is having a reaction to it?
My son became achy all over after beginning on singulair and after a week of being on it without any change in the achiness, his doctor removed him from it. Years later, he no longer takes any asthma med on a regular basis...just keeps an inhaler on hand in case of emergency. At 18, he now uses diet and regular exercise to help control his symptoms.
In any event, I will of course pray for your daughter. No one should suffer like that but it hurts my heart especially when I hear of a child suffering.