I guess you have very serious problem with allergies, because your usual reaction to allergens is a severe, whole-body allergic reaction, anaphylaxis.
Difficulty breathing, wheezing, nasal congestion, generalized itching, cough, nausea, vomiting, diarrhea and other more, are all symptoms of anaphylaxis.
How often you are experiencing anaphylaxis?
Do you get immediate medical attention at that moment?
Do you suffer from food, drug or insect bites allergies or you are getting allergy reactions with no identifiable cause.
Do you take meds to prevent allergies?