It is possible thatyou stirred up a lot of mold and
fungus out in the hay. Most people are affected by mold and
hay is full of it. It probablty would not show up on a chest x-ray unless you had pemanent damage in your airways. Try some zyrtec
, Allegra, or whatever allergy medicine your Dr. will give you for about a week. If you are stil having problems, you may consider Pulmonary Function Tests (PFT), and an Echocardiogram.