Allergic rihinitis. Test should i do.

I am suffering from irritaion behind the nose, feeling cold in nose every morning since 8 months....I have other symptoms like... Feeling fever in body but temperature is normal... Whole body pain...headache... I have no.. Runny nose...and no sneezing and couging at all. But feeling cold in behind the... With mucus production in nose... I have done all test like...CBC, LFT, KFT, CHEST CT SCAN AND NOSE CT SCAN...AFB TEST ALL COMES NORMAL... DR SAID THAT YOU HAVE NOSE ALLERGY... but i am cofused that... Can it be?? Beacuse i have no sneezing, no runny nose and coughing...only symptoms have like... Cold in behind the nose with mucus production and fever like feeling... Pain in whole body...please guide me...what further test should i do...because...all day i am feeling tired and sad... Please🙏🙏🙏help