Child Asthma

I am seeking help for my son's chronic asthma. He is now 6 years old.
He was diagnosed with asthma when he was 2 yrs and 6 months old. Everything started
after a visit to India. After the long flight to india, he got sick with fever and cough.
The Doctor prescribed antibiotics, cough meds and de-worming med. After he got well the cough lingered.
After returning to USA the cough continued, had coughing spasms while playing, crying, in the night used to wake up due to cough.
The doctor prescribed albuterol sulphate soln. didn't help much, he was later referred to an allergy and asthma specialist.

Now he takes singulair 5 mg every night. QVar Inhaler Twice a day and allergy med. Zyretec 5mg almost every day. When gets sick with a cold
his asthma gets worse and he uses nebulized Pulmicort respules and albuterol.

During the summer season he is better, not many asthma attacks. But in the winter he gets frequently ill.
Doesn't have much resistance.
So his asthma aslo worse. gets frequent attacks. He does not wheeze much. Main symptom is hacking cough. and retractions of
stomach. Sometimes vomits after too much coughing. eyes are watery.

In the night even when he is symptom free, his head sweats while sleeping. has dark circles around the eyes.
Allergies throughout the year and worse in Spring and Summer. His eyes are itchy, throat itchy, inside ears itchy.

After started having asthma, his character changed. He is very sensitive now, cries easily, not very attentive in classes.
teachers say he does not follow rules, they have to repeatedly tell him to to things.

Eating habits - more affinity to junk foods, but regularly eats rice, veggies and fruits.

Mother has asthma and allergies, while Pregnant had asthma and was on theophylline, salmeterol and albuterol. asthma was worse during pregnancy.
and Father has allergies in the spring.