Hi kte. Tom is away right now. I will try to answer your question. You are too young to fast. Your body hasn’t fully developed as of yet. I would recommend a mostly raw food diet. Studies indicate that children who had diets that contained a high intake of fruits and vegetables were less likely to develop asthma than those whose diets were less healthy.
Also vitamin C is very good for asthma sufferers. As well as many herbs and nutrients. Stay away from smokers, dust and mold. Environment and diet are the biggest triggers of an attack.
Here is some natural remedies and information: http://naturalasthmaremedy.org