The last two weeks ive consistently had itchy nose resulting in constant sneezing, runny nose, eyes watering, throat closing, shortness of breath. what is it?

Doctor can evaluate: If due to allergies, adults and older children can try allergy pills such as Claritin, Zyrtec, Allegra, or Benadryl (diphenhydramine). Benadryl is sedating. The allergy pills help with allergies in the eyes, nose, skin, etc... However, eye allergies sometimes need prescription eye drops, nasal sprays, or Singulair, for extra help with symptoms. "Throat closing" may be a life-threatening emergency.