 [ Symptoms ] i ‘ve have difficulty breathing blocked nose runny nose teary eyes for long time now chest pains [ Disease ] com you are suffering from allergic rhinitis and bronchitis normally histamines works well for that but it seems you are not getting away from the irritants 2 years is a long time as you must have known your irritant substancesdust smoke animal fur pollen etc  you need to find it out you can get an iga analysis which can help and your doctor may need to add corticosteroid therapy for histsmines stay hydrated well and avoid cold weather changes work on your immunity by eating healthy vegetables and fruits