Hi,
Although pine allergy is rare it is possible to develop it.Pine tree pollen is produced in large amounts by a common tree, which would make it a good candidate for causing allergy. Of all the things that can cause an allergy, pollen is one of the most widespread.
In your case you seem to have developed allergic asthma.
Asthma may be a chronic or acute condition involving the respiratory system in which the airways (the bronchi and bronchioles) become inflamed and constrict, and are lined with large amounts of mucus, often in response to one or more triggers.[1] These episodes may be triggered by such things as exposure to an environmental stimulant such as an allergen.
This airway narrowing causes symptoms such as wheezing, shortness of breath, chest tightness, and coughing.
The most effective treatment for asthma is identifying triggers, such as pets or aspirin, and limiting or eliminating exposure to them. If trigger avoidance is insufficient, medical treatment is available. Desensitization is currently the only known "cure" to the disease.
Other forms of treatment include relief medication, prevention medication, long-acting β2-agonists, and emergency treatment.
Current treatment protocols recommend prevention medications such as an inhaled corticosteroid, which helps to suppress inflammation and reduces the swelling of the lining of the airways, in anyone who has frequent (greater than twice a week) need of relievers or who has severe symptoms. If symptoms persist, additional preventive drugs are added until the asthma is controlled. With the proper use of prevention drugs, asthmatics can avoid the complications that result from overuse of relief medications.
ref:http://en.wikipedia.org/wiki/Asthma
Hope this information helps you.