Reactive Airway Disease (RAD): Given Deandra's symptoms of respiratory distress and wheezing after exposure to pets she is allergic to, and the fact that she is still struggling despite treatment for allergies and asthma, RAD is a plausible diagnosis. It is often considered in patients with symptoms suggestive of asthma but without a clear diagnosis of asthma.

Asthma: Although Deandra does not have a prior history of asthma, it is possible that her symptoms represent a new onset of the disease, especially given her allergic background and response to allergens.
Allergic Bronchitis: This condition could explain her respiratory symptoms in the context of allergen exposure, and it might not have been fully addressed by her current treatment for allergies.
Chronic Obstructive Pulmonary Disease (COPD) Exacerbation: Less likely given her age and lack of smoking history, but could be considered if she has other risk factors or if her symptoms do not fully respond to asthma or allergy treatments.

Pulmonary Embolism: Although unlikely, pulmonary embolism can present with sudden onset of respiratory distress and could be fatal if missed. It's essential to consider this, especially if Deandra has any risk factors for thromboembolic disease.
Pneumonia: An infectious cause of her symptoms should be considered, especially if she has fever, cough, or other signs of infection. Pneumonia can be severe and requires prompt treatment.
Anaphylaxis: Given her known allergies, anaphylaxis is a life-threatening condition that must be considered, especially if she exhibits symptoms beyond respiratory distress, such as cardiovascular instability or significant swelling.

Vocal Cord Dysfunction: This condition can mimic asthma and presents with wheezing and respiratory distress but is related to abnormal vocal cord function rather than airway inflammation.
Eosinophilic Pneumonia: A rare condition characterized by an accumulation of eosinophils in the lungs, which could be related to her allergic background and might present with respiratory symptoms similar to those she is experiencing.
Churg-Strauss Syndrome: A rare autoimmune condition that can cause asthma-like symptoms, eosinophilia, and vasculitis, which could be considered if her symptoms are severe and not responding to conventional treatments.