Thanks for your question on Health Care Magic.
I can understand your concern.
Yes, long duration inhalation of Ammonia and bleach cancer lead to
bronchitis.
But 10-15 minutes of exposure is not much worrisome.
Usually this kind of bronchitis is self limiting with avoidance of further exposure and inhalation of fresh air.
But of your symptoms worsen or persist after 1-2 days then better to
consult pulmonologist and get done clinical examination of respiratory system and PFT (Pulmonary Function Test).
PFT will tell you about severity of the bronchitis. And treatment is based on severity only. You may need inhaled bronchodilators and inhaled corticosteroid (ICS).
Oral anti Inflammatory drugs are also indicated.
So at present, no need to worry. But if your symptoms are persisting then consult pulmonologist.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.